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* Re: request for help on uvcvideo driver issue
       [not found] <CAKAO289-s=VJYJzt5JBCSvAzHmG-KMY12yX-RMREQTQCHVe6YA@mail.gmail.com>
@ 2022-11-23 20:04 ` Laurent Pinchart
       [not found]   ` <CAKAO28-5OPZgz=7oSr9qrU0KRB7=Tmfj_nM3DQP6rdgw61=YaQ@mail.gmail.com>
  0 siblings, 1 reply; 4+ messages in thread
From: Laurent Pinchart @ 2022-11-23 20:04 UTC (permalink / raw)
  To: Amos Tibaldi; +Cc: linux-media

Hi Amos,

CC'ing the linux-media mailing list.

On Wed, Nov 23, 2022 at 07:16:05PM +0100, Amos Tibaldi wrote:
> Hello,
>    I have a usb framegrabber and it worked fine in ubuntu 20.04 and previous
> releases of ubuntu with the uvcvideo.ko kernel module but now that I have
> ubuntu 22.10 the uvcvideo.ko does not work with the ezcap261 framegrabber. The
> ko is loaded but cheese or xawtv or vlc go on timeout when issuing video
> acquisition, and the select returns wrong argument. I have also updated the
> firmware of the framegrabber. What can I do?

Could you please send a copy of the kernel log, in text form ? You can
retrieve it with `dmesg` or `sudo dmesg`. I'm particularly interested in
messages printed when the device is plugged in, or when an application
attempts to use it.

-- 
Regards,

Laurent Pinchart

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: request for help on uvcvideo driver issue
       [not found]   ` <CAKAO28-5OPZgz=7oSr9qrU0KRB7=Tmfj_nM3DQP6rdgw61=YaQ@mail.gmail.com>
@ 2022-11-25  1:32     ` Laurent Pinchart
       [not found]       ` <CAKAO289ZCUgpCmgOO8Oe3DNB60tLHvmRq_zu_zOmUkvO19C7OA@mail.gmail.com>
  0 siblings, 1 reply; 4+ messages in thread
From: Laurent Pinchart @ 2022-11-25  1:32 UTC (permalink / raw)
  To: Amos Tibaldi; +Cc: linux-media

Hi Amos,

Could you please avoid dropping the mailing list from CC when replying ?

On Wed, Nov 23, 2022 at 09:43:10PM +0100, Amos Tibaldi wrote:
> Hello, I attached the dmesg text file of one linux mint 20.1 that I have
> just installed. The issue is the same. I hope it helps. Thanks.

Quoting the interesting part from the log:

> [  823.596518] usb 2-3: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
> [  823.629237] usb 2-3: New USB device found, idVendor=1bcf, idProduct=2c99, bcdDevice= 2.00
> [  823.629239] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [  823.629240] usb 2-3: Product: ezcap U3 capture
> [  823.629241] usb 2-3: Manufacturer: VXIS Inc

So far so good.

> [  823.659423] mc: Linux media interface: v0.10
> [  823.667890] videodev: Linux video capture interface: v2.00
> [  823.678367] usb 2-3: 3:1: cannot get freq at ep 0x86
> [  823.685869] usb 2-3: 3:2: cannot get freq at ep 0x86
> [  823.692874] usb 2-3: 3:3: cannot get freq at ep 0x86

This I don't like. I've seen many devices having trouble with the audio
side, which resulted in different kind of firmware misbehaviours (most
likely including crashes) that affected the video side. Could you try to
blacklist the snd_usb_audio module to see if it helps ? It can be done
by adding

blacklist snd_usb_audio

to /etc/modprobe.d/blacklist.conf

> [  823.738250] usb 2-3: Warning! Unlikely big volume range (=4096), cval->res is probably wrong.
> [  823.738252] usb 2-3: [5] FU [Digital In Capture Volume] ch = 1, val = 0/4096/1
> [  823.738384] usbcore: registered new interface driver snd-usb-audio
> [  823.740047] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> [  823.760905] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input17
> [  823.760976] usbcore: registered new interface driver uvcvideo
> [  823.760977] USB Video Class driver (1.1.1)

Could you start video capture with any application and check if
additional messages are then printed in the kernel log ?

> On Wed, Nov 23, 2022 at 9:04 PM Laurent Pinchart wrote:
> 
> > Hi Amos,
> >
> > CC'ing the linux-media mailing list.
> >
> > On Wed, Nov 23, 2022 at 07:16:05PM +0100, Amos Tibaldi wrote:
> > > Hello,
> > >    I have a usb framegrabber and it worked fine in ubuntu 20.04 and previous
> > > releases of ubuntu with the uvcvideo.ko kernel module but now that I have
> > > ubuntu 22.10 the uvcvideo.ko does not work with the ezcap261 framegrabber. The
> > > ko is loaded but cheese or xawtv or vlc go on timeout when issuing video
> > > acquisition, and the select returns wrong argument. I have also updated the
> > > firmware of the framegrabber. What can I do?
> >
> > Could you please send a copy of the kernel log, in text form ? You can
> > retrieve it with `dmesg` or `sudo dmesg`. I'm particularly interested in
> > messages printed when the device is plugged in, or when an application
> > attempts to use it.

-- 
Regards,

Laurent Pinchart

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: request for help on uvcvideo driver issue
       [not found]       ` <CAKAO289ZCUgpCmgOO8Oe3DNB60tLHvmRq_zu_zOmUkvO19C7OA@mail.gmail.com>
@ 2022-11-25 15:53         ` Laurent Pinchart
       [not found]           ` <CAKAO28-2TdOjjGN0hYwwN-u7e0makaOX=OLOwWoTCX4VRJvtvQ@mail.gmail.com>
  0 siblings, 1 reply; 4+ messages in thread
From: Laurent Pinchart @ 2022-11-25 15:53 UTC (permalink / raw)
  To: Amos Tibaldi; +Cc: linux-media

Hi Amos,

On Fri, Nov 25, 2022 at 03:11:22AM +0100, Amos Tibaldi wrote:
> Hello, I blacklisted the snd_usb_audio and traced 0xffff uvcvideo.ko. The
> problem has slightly changed. Now the frames are coming but are not shown,
> as you can see from the syslog and dmesg below. Cheese, mpv, vlc, xawtv
> show all black window
> 
> tibaldi@ryzen:~/Desktop/src/svl2/SimpleV4L2-SimpleV4L2_v0.2.5/build$ xawtv
> This is xawtv-3.106, running on Linux/x86_64 (5.4.212)
> xinerama 0: 1920x1080+0+0
> vid-open-auto: using grabber/webcam device /dev/video0
> v4l2: oops: select timeout

[snip]

> [  686.740627] uvcvideo: Probing generic UVC device 3
> [  686.742123] uvcvideo: Found format MJPEG.
> [  686.742125] uvcvideo: - 1920x1080 (30.0 fps)
> [  686.742126] uvcvideo: - 640x480 (30.0 fps)
> [  686.742127] uvcvideo: - 800x600 (30.0 fps)
> [  686.742128] uvcvideo: - 1024x768 (30.0 fps)
> [  686.742129] uvcvideo: - 1280x720 (30.0 fps)
> [  686.742130] uvcvideo: - 1280x960 (30.0 fps)
> [  686.742130] uvcvideo: - 1280x1024 (30.0 fps)
> [  686.742131] uvcvideo: - 1360x768 (30.0 fps)
> [  686.742132] uvcvideo: - 1400x900 (30.0 fps)
> [  686.742133] uvcvideo: - 1440x900 (30.0 fps)
> [  686.742134] uvcvideo: Found format YUV 4:2:2 (YUYV).
> [  686.742135] uvcvideo: - 1920x1080 (30.0 fps)
> [  686.742135] uvcvideo: - 640x480 (30.0 fps)
> [  686.742136] uvcvideo: - 800x600 (30.0 fps)
> [  686.742137] uvcvideo: - 1024x768 (30.0 fps)
> [  686.742138] uvcvideo: - 1280x720 (30.0 fps)
> [  686.742139] uvcvideo: - 1280x960 (30.0 fps)
> [  686.742140] uvcvideo: - 1280x1024 (30.0 fps)
> [  686.742141] uvcvideo: - 1360x768 (30.0 fps)
> [  686.742141] uvcvideo: - 1400x900 (30.0 fps)
> [  686.742142] uvcvideo: - 1440x900 (30.0 fps)
> [  686.742146] uvcvideo: Found a Status endpoint (addr 87).
> [  686.742147] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> [  686.742151] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/2 to device 3 entity 2
> [  686.743061] uvcvideo: Adding mapping 'Brightness' to control 00000000-0000-0000-0000-000000000101/2.
> [  686.743063] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/3 to device 3 entity 2
> [  686.744306] uvcvideo: Adding mapping 'Contrast' to control 00000000-0000-0000-0000-000000000101/3.
> [  686.744307] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/6 to device 3 entity 2
> [  686.745557] uvcvideo: Adding mapping 'Hue' to control 00000000-0000-0000-0000-000000000101/6.
> [  686.745558] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/7 to device 3 entity 2
> [  686.746808] uvcvideo: Adding mapping 'Saturation' to control 00000000-0000-0000-0000-000000000101/7.
> [  686.746811] uvcvideo: Scanning UVC chain: OT 5 <- XU 4 <- XU 3 <- PU 2 <- IT 1
> [  686.746814] uvcvideo: Found a valid video chain (1 -> 5).
> [  686.759767] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input20
> [  686.759814] uvcvideo: UVC device initialized.
> [  686.759856] usbcore: registered new interface driver uvcvideo
> [  686.759857] USB Video Class driver (1.1.1)
> [  688.950588] uvcvideo: Suspending interface 1
> [  688.950591] uvcvideo: Suspending interface 0
> [  693.066866] uvcvideo: uvc_v4l2_open
> [  693.164163] uvcvideo: Resuming interface 0
> [  693.164164] uvcvideo: Resuming interface 1
> [  693.164213] uvcvideo: uvc_v4l2_poll
> [  693.164216] uvcvideo: uvc_v4l2_read: not implemented.

That's an ancient API that the uvcvideo driver doesn't support. xawtv is
likely a bad test application. Let's start simply, could you run

yavta -f YUYV -s 1920x1080 -c10 /dev/video0

and provide both the kernel log and the messages output by yavta ?

> [  693.164220] uvcvideo: uvc_v4l2_poll
> [  693.164221] uvcvideo: uvc_v4l2_read: not implemented.
> [  693.164234] uvcvideo: uvc_v4l2_poll
> [  693.164234] uvcvideo: uvc_v4l2_read: not implemented.
> [  693.164240] uvcvideo: uvc_v4l2_poll
> [  693.164241] uvcvideo: uvc_v4l2_read: not implemented.
> [  693.167317] uvcvideo: uvc_v4l2_poll
> [  693.167320] uvcvideo: uvc_v4l2_read: not implemented.
> [  693.167887] uvcvideo: uvc_v4l2_open
> [  693.167894] uvcvideo: uvc_ioctl_g_input 1
> [  693.167895] uvcvideo: uvc_ioctl_enum_input 1
> [  693.167903] uvcvideo: Trying format 0x32315559 (YU12): 1920x1080.
> [  693.167904] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> [  693.181968] uvcvideo: Trying format 0x32315559 (YU12): 1920x1080.
> [  693.181970] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> [  693.196719] uvcvideo: Trying format 0x32315659 (YV12): 1920x1080.
> [  693.196721] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> [  693.210226] uvcvideo: Trying format 0x50323234 (422P): 1920x1080.
> [  693.210228] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> [  693.224215] uvcvideo: Trying format 0x56595559 (YUYV): 1920x1080.
> [  693.224217] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> [  693.237715] uvcvideo: uvc_ioctl_g_parm 1
> [  693.251341] uvcvideo: uvc_v4l2_mmap
> [  693.251460] uvcvideo: uvc_v4l2_mmap
> [  693.251536] uvcvideo: uvc_v4l2_mmap
> [  693.251602] uvcvideo: uvc_v4l2_mmap
> [  693.251660] uvcvideo: uvc_v4l2_mmap
> [  693.251715] uvcvideo: uvc_v4l2_mmap
> [  693.251768] uvcvideo: uvc_v4l2_mmap
> [  693.251821] uvcvideo: uvc_v4l2_mmap
> [  693.251873] uvcvideo: uvc_v4l2_mmap
> [  693.251925] uvcvideo: uvc_v4l2_mmap
> [  693.251977] uvcvideo: uvc_v4l2_mmap
> [  693.252030] uvcvideo: uvc_v4l2_mmap
> [  693.252082] uvcvideo: uvc_v4l2_mmap
> [  693.252134] uvcvideo: uvc_v4l2_mmap
> [  693.252185] uvcvideo: uvc_v4l2_mmap
> [  693.252237] uvcvideo: uvc_v4l2_mmap
> [  693.252288] uvcvideo: uvc_v4l2_mmap
> [  693.252340] uvcvideo: uvc_v4l2_mmap
> [  693.252391] uvcvideo: uvc_v4l2_mmap
> [  693.252442] uvcvideo: uvc_v4l2_mmap
> [  693.252494] uvcvideo: uvc_v4l2_mmap
> [  693.252545] uvcvideo: uvc_v4l2_mmap
> [  693.252596] uvcvideo: uvc_v4l2_mmap
> [  693.252648] uvcvideo: uvc_v4l2_mmap
> [  693.252699] uvcvideo: uvc_v4l2_mmap
> [  693.252750] uvcvideo: uvc_v4l2_mmap
> [  693.252801] uvcvideo: uvc_v4l2_mmap
> [  693.252852] uvcvideo: uvc_v4l2_mmap
> [  693.252903] uvcvideo: uvc_v4l2_mmap
> [  693.252954] uvcvideo: uvc_v4l2_mmap
> [  693.253005] uvcvideo: uvc_v4l2_mmap
> [  693.253056] uvcvideo: uvc_v4l2_mmap
> [  693.253126] uvcvideo: uvc_ioctl_streamon 1
> [  693.253126] uvcvideo: uvc_ioctl_streamon 2
> [  693.255834] uvcvideo: Allocated 5 URB buffers of 16x1024 bytes each.
> [  693.528952] uvcvideo: Frame complete (EOF found).
> [  693.528953] uvcvideo: EOF in empty payload.
> [  693.530411] uvcvideo: frame 1 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 532789400/536923291/88
> [  693.562281] uvcvideo: Frame complete (EOF found).
> [  693.562282] uvcvideo: EOF in empty payload.
> [  693.563740] uvcvideo: frame 2 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 536945656/541069838/121
> [  693.595614] uvcvideo: Frame complete (EOF found).
> [  693.595615] uvcvideo: EOF in empty payload.
> [  693.597074] uvcvideo: frame 3 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 541101909/545231972/154
> [  693.628948] uvcvideo: Frame complete (EOF found).
> [  693.628949] uvcvideo: EOF in empty payload.
> [  693.630406] uvcvideo: frame 4 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 254/255 scr, last pts/stc/sof 545258164/549394108/188
> [  693.662279] uvcvideo: Frame complete (EOF found).
> [  693.662280] uvcvideo: EOF in empty payload.
> .......
> [  710.361665] uvcvideo: EOF in empty payload.
> [  710.363124] uvcvideo: frame 506 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 2631698065/2635823538/534
> [  710.394996] uvcvideo: Frame complete (EOF found).
> [  710.394997] uvcvideo: EOF in empty payload.
> [  710.396456] uvcvideo: frame 507 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 2635854320/2639985673/567
> [  710.428329] uvcvideo: Frame complete (EOF found).
> [  710.428330] uvcvideo: EOF in empty payload.
> [  710.428407] uvcvideo: uvc_ioctl_streamoff 1
> [  710.432808] uvcvideo: uvc_v4l2_release
> [  710.435191] uvcvideo: uvc_v4l2_release
> [  712.815575] uvcvideo: Suspending interface 1
> [  712.815578] uvcvideo: Suspending interface 0
> 
> On Fri, Nov 25, 2022 at 2:32 AM Laurent Pinchart wrote:
> 
> > Hi Amos,
> >
> > Could you please avoid dropping the mailing list from CC when replying ?
> >
> > On Wed, Nov 23, 2022 at 09:43:10PM +0100, Amos Tibaldi wrote:
> > > Hello, I attached the dmesg text file of one linux mint 20.1 that I have
> > > just installed. The issue is the same. I hope it helps. Thanks.
> >
> > Quoting the interesting part from the log:
> >
> > > [  823.596518] usb 2-3: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
> > > [  823.629237] usb 2-3: New USB device found, idVendor=1bcf, idProduct=2c99, bcdDevice= 2.00
> > > [  823.629239] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > > [  823.629240] usb 2-3: Product: ezcap U3 capture
> > > [  823.629241] usb 2-3: Manufacturer: VXIS Inc
> >
> > So far so good.
> >
> > > [  823.659423] mc: Linux media interface: v0.10
> > > [  823.667890] videodev: Linux video capture interface: v2.00
> > > [  823.678367] usb 2-3: 3:1: cannot get freq at ep 0x86
> > > [  823.685869] usb 2-3: 3:2: cannot get freq at ep 0x86
> > > [  823.692874] usb 2-3: 3:3: cannot get freq at ep 0x86
> >
> > This I don't like. I've seen many devices having trouble with the audio
> > side, which resulted in different kind of firmware misbehaviours (most
> > likely including crashes) that affected the video side. Could you try to
> > blacklist the snd_usb_audio module to see if it helps ? It can be done
> > by adding
> >
> > blacklist snd_usb_audio
> >
> > to /etc/modprobe.d/blacklist.conf
> >
> > > [  823.738250] usb 2-3: Warning! Unlikely big volume range (=4096), cval->res is probably wrong.
> > > [  823.738252] usb 2-3: [5] FU [Digital In Capture Volume] ch = 1, val = 0/4096/1
> > > [  823.738384] usbcore: registered new interface driver snd-usb-audio
> > > [  823.740047] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> > > [  823.760905] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input17
> > > [  823.760976] usbcore: registered new interface driver uvcvideo
> > > [  823.760977] USB Video Class driver (1.1.1)
> >
> > Could you start video capture with any application and check if
> > additional messages are then printed in the kernel log ?
> >
> > > On Wed, Nov 23, 2022 at 9:04 PM Laurent Pinchart wrote:
> > >
> > > > Hi Amos,
> > > >
> > > > CC'ing the linux-media mailing list.
> > > >
> > > > On Wed, Nov 23, 2022 at 07:16:05PM +0100, Amos Tibaldi wrote:
> > > > > Hello,
> > > > >    I have a usb framegrabber and it worked fine in ubuntu 20.04 and previous
> > > > > releases of ubuntu with the uvcvideo.ko kernel module but now that I have
> > > > > ubuntu 22.10 the uvcvideo.ko does not work with the ezcap261 framegrabber. The
> > > > > ko is loaded but cheese or xawtv or vlc go on timeout when issuing video
> > > > > acquisition, and the select returns wrong argument. I have also updated the
> > > > > firmware of the framegrabber. What can I do?
> > > >
> > > > Could you please send a copy of the kernel log, in text form ? You can
> > > > retrieve it with `dmesg` or `sudo dmesg`. I'm particularly interested in
> > > > messages printed when the device is plugged in, or when an application
> > > > attempts to use it.

-- 
Regards,

Laurent Pinchart

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: request for help on uvcvideo driver issue
       [not found]             ` <CAKAO28_nE6v+f8wPab9cHuJRwjmneaADLy-GwsWQEk343=dERg@mail.gmail.com>
@ 2022-11-28 14:24               ` Laurent Pinchart
  0 siblings, 0 replies; 4+ messages in thread
From: Laurent Pinchart @ 2022-11-28 14:24 UTC (permalink / raw)
  To: Amos Tibaldi; +Cc: linux-media

Hi Amos,

On Sat, Nov 26, 2022 at 06:06:48PM +0100, Amos Tibaldi wrote:
> Hello. Anyway the 10 frames captured are empty, so there is a problem
> anyway.

The logs suggest otherwise. yavta doesn't capture frames to disk by
default. Could you add the `-F` argument and check if frames are
captured correctly ?

> I wonder why two years ago the driver was working and now not any more.
> 
> On Fri, Nov 25, 2022 at 6:38 PM Amos Tibaldi <tibaldi.amos@gmail.com> wrote:
> 
> > Hello, here is the output from yavta, it captures 10 frames but does not
> > show anything, and if I run it again other times it captures nothing more,
> > unluckily.
> >
> > tibaldi@ryzen:~/Desktop/src/yavta$ yavta -f YUYV -s 1920x1080 -c10
> > /dev/video0
> > Device /dev/video0 opened.
> > Device `ezcap U3 capture: ezcap U3 capt' on `usb-0000:02:00.0-3' (driver
> > 'uvcvideo') supports video, capture, without mplanes.
> > Video format set: YUYV (56595559) 1920x1080 (stride 3840) field none
> > buffer size 4147200
> > Video format: YUYV (56595559) 1920x1080 (stride 3840) field none buffer
> > size 4147200
> > 8 buffers requested.
> > length: 4147200 offset: 0 timestamp type/source: mono/SoE
> > Buffer 0/0 mapped at address 0x7fcd90081000.
> > length: 4147200 offset: 4149248 timestamp type/source: mono/SoE
> > Buffer 1/0 mapped at address 0x7fcd8fc8c000.
> > length: 4147200 offset: 8298496 timestamp type/source: mono/SoE
> > Buffer 2/0 mapped at address 0x7fcd8f897000.
> > length: 4147200 offset: 12447744 timestamp type/source: mono/SoE
> > Buffer 3/0 mapped at address 0x7fcd8f4a2000.
> > length: 4147200 offset: 16596992 timestamp type/source: mono/SoE
> > Buffer 4/0 mapped at address 0x7fcd8f0ad000.
> > length: 4147200 offset: 20746240 timestamp type/source: mono/SoE
> > Buffer 5/0 mapped at address 0x7fcd8ecb8000.
> > length: 4147200 offset: 24895488 timestamp type/source: mono/SoE
> > Buffer 6/0 mapped at address 0x7fcd8e8c3000.
> > length: 4147200 offset: 29044736 timestamp type/source: mono/SoE
> > Buffer 7/0 mapped at address 0x7fcd8e4ce000.
> > 0 (0) [-] none 0 4147200 B 636.063000 636.094430 4.068 fps ts mono/SoE
> > 1 (1) [-] none 1 4147200 B 636.095847 636.127739 30.444 fps ts mono/SoE
> > 2 (2) [-] none 2 4147200 B 636.129171 636.161062 30.008 fps ts mono/SoE
> > 3 (3) [-] none 3 4147200 B 636.162494 636.194385 30.009 fps ts mono/SoE
> > 4 (4) [-] none 4 4147200 B 636.195818 636.227709 30.008 fps ts mono/SoE
> > 5 (5) [-] none 5 4147200 B 636.229142 636.261034 30.008 fps ts mono/SoE
> > 6 (6) [-] none 6 4147200 B 636.262465 636.294357 30.009 fps ts mono/SoE
> > 7 (7) [-] none 7 4147200 B 636.295789 636.327681 30.008 fps ts mono/SoE
> > 8 (0) [-] none 8 4147200 B 636.329112 636.361005 30.009 fps ts mono/SoE
> > 9 (1) [-] none 9 4147200 B 636.362436 636.394328 30.008 fps ts mono/SoE
> > Captured 10 frames in 0.577147 seconds (17.326601 fps, 71856878.812123 B/s).
> > 8 buffers released.
> > tibaldi@ryzen:~/Desktop/src/yavta$ ls
> > yavta-0.0+git20190114.e21525b
> >  yavta_0.0+git20190114.e21525b-1.debian.tar.xz
> >  yavta_0.0+git20190114.e21525b-1.dsc
> >  yavta_0.0+git20190114.e21525b.orig.tar.gz
> > tibaldi@ryzen:~/Desktop/src/yavta$
> >
> > Here is the dmesg:
> >
> > [  590.224080] usb 2-3: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
> > [  590.257648] usb 2-3: New USB device found, idVendor=1bcf, idProduct=2c99, bcdDevice= 2.00
> > [  590.257651] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > [  590.257652] usb 2-3: Product: ezcap U3 capture
> > [  590.257653] usb 2-3: Manufacturer: VXIS Inc
> > [  590.288882] mc: Linux media interface: v0.10
> > [  590.295626] videodev: Linux video capture interface: v2.00
> > [  590.302902] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> > [  590.322509] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input17
> > [  590.322603] usbcore: registered new interface driver uvcvideo
> > [  590.322603] USB Video Class driver (1.1.1)
> > [  722.776405] usbcore: deregistering interface driver uvcvideo
> > [  730.533290] uvcvideo: Probing generic UVC device 3
> > [  730.534818] uvcvideo: Found format MJPEG.
> > [  730.534820] uvcvideo: - 1920x1080 (30.0 fps)
> > [  730.534820] uvcvideo: - 640x480 (30.0 fps)
> > [  730.534821] uvcvideo: - 800x600 (30.0 fps)
> > [  730.534822] uvcvideo: - 1024x768 (30.0 fps)
> > [  730.534822] uvcvideo: - 1280x720 (30.0 fps)
> > [  730.534823] uvcvideo: - 1280x960 (30.0 fps)
> > [  730.534824] uvcvideo: - 1280x1024 (30.0 fps)
> > [  730.534824] uvcvideo: - 1360x768 (30.0 fps)
> > [  730.534825] uvcvideo: - 1400x900 (30.0 fps)
> > [  730.534825] uvcvideo: - 1440x900 (30.0 fps)
> > [  730.534826] uvcvideo: Found format YUV 4:2:2 (YUYV).
> > [  730.534827] uvcvideo: - 1920x1080 (30.0 fps)
> > [  730.534827] uvcvideo: - 640x480 (30.0 fps)
> > [  730.534828] uvcvideo: - 800x600 (30.0 fps)
> > [  730.534829] uvcvideo: - 1024x768 (30.0 fps)
> > [  730.534829] uvcvideo: - 1280x720 (30.0 fps)
> > [  730.534830] uvcvideo: - 1280x960 (30.0 fps)
> > [  730.534831] uvcvideo: - 1280x1024 (30.0 fps)
> > [  730.534831] uvcvideo: - 1360x768 (30.0 fps)
> > [  730.534832] uvcvideo: - 1400x900 (30.0 fps)
> > [  730.534832] uvcvideo: - 1440x900 (30.0 fps)
> > [  730.534835] uvcvideo: Found a Status endpoint (addr 87).
> > [  730.534836] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> > [  730.534839] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/2 to device 3 entity 2
> > [  730.536029] uvcvideo: Adding mapping 'Brightness' to control 00000000-0000-0000-0000-000000000101/2.
> > [  730.536032] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/3 to device 3 entity 2
> > [  730.537278] uvcvideo: Adding mapping 'Contrast' to control 00000000-0000-0000-0000-000000000101/3.
> > [  730.537281] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/6 to device 3 entity 2
> > [  730.538778] uvcvideo: Adding mapping 'Hue' to control 00000000-0000-0000-0000-000000000101/6.
> > [  730.538781] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/7 to device 3 entity 2
> > [  730.539779] uvcvideo: Adding mapping 'Saturation' to control 00000000-0000-0000-0000-000000000101/7.
> > [  730.539782] uvcvideo: Scanning UVC chain: OT 5 <- XU 4 <- XU 3 <- PU 2 <- IT 1
> > [  730.539785] uvcvideo: Found a valid video chain (1 -> 5).
> > [  730.552707] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input18
> > [  730.552746] uvcvideo: UVC device initialized.
> > [  730.552778] usbcore: registered new interface driver uvcvideo
> > [  730.552779] USB Video Class driver (1.1.1)
> > [  730.555114] uvcvideo: uvc_v4l2_open
> > [  730.555199] uvcvideo: uvc_v4l2_release
> > [  730.560666] uvcvideo: uvc_v4l2_open
> > [  730.560675] uvcvideo: uvc_v4l2_release
> > [  730.561046] uvcvideo: uvc_v4l2_open
> > [  730.561053] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.561090] uvcvideo: uvc_v4l2_open
> > [  730.561095] uvcvideo: uvc_v4l2_release
> > [  730.561147] uvcvideo: uvc_v4l2_open
> > [  730.561149] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.565780] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.565784] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.570782] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.570802] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.576534] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.582041] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.582065] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.582067] uvcvideo: uvc_v4l2_release
> > [  730.582069] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.582071] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.582073] uvcvideo: uvc_ioctl_queryctrl 1
> > [  730.582075] uvcvideo: uvc_v4l2_release
> > [  732.812026] uvcvideo: Suspending interface 1
> > [  732.812028] uvcvideo: Suspending interface 0
> > [  735.089271] uvcvideo: uvc_v4l2_open
> > [  735.188180] uvcvideo: Resuming interface 0
> > [  735.188182] uvcvideo: Resuming interface 1
> > [  735.188308] uvcvideo: Trying format 0x56595559 (YUYV): 1920x1080.
> > [  735.188309] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> > [  735.205693] uvcvideo: uvc_v4l2_mmap
> > [  735.205798] uvcvideo: uvc_v4l2_mmap
> > [  735.205868] uvcvideo: uvc_v4l2_mmap
> > [  735.205938] uvcvideo: uvc_v4l2_mmap
> > [  735.206007] uvcvideo: uvc_v4l2_mmap
> > [  735.206075] uvcvideo: uvc_v4l2_mmap
> > [  735.206144] uvcvideo: uvc_v4l2_mmap
> > [  735.206213] uvcvideo: uvc_v4l2_mmap
> > [  735.206288] uvcvideo: uvc_ioctl_streamon 1
> > [  735.206289] uvcvideo: uvc_ioctl_streamon 2
> > [  735.208655] uvcvideo: Allocated 5 URB buffers of 16x1024 bytes each.
> > [  735.484187] uvcvideo: Frame complete (EOF found).
> > [  735.484188] uvcvideo: EOF in empty payload.
> > [  735.485645] uvcvideo: frame 1 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 252/255 scr, last pts/stc/sof 1327236385/1331368258/1068
> > [  735.517519] uvcvideo: Frame complete (EOF found).
> > [  735.517520] uvcvideo: EOF in empty payload.
> > [  735.518977] uvcvideo: frame 2 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 254/255 scr, last pts/stc/sof 1331392640/1335530392/1102
> > [  735.550850] uvcvideo: Frame complete (EOF found).
> > [  735.550850] uvcvideo: EOF in empty payload.
> > [  735.552311] uvcvideo: frame 3 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 1335548893/1339676935/1135
> > [  735.584182] uvcvideo: Frame complete (EOF found).
> > [  735.584183] uvcvideo: EOF in empty payload.
> > [  735.585642] uvcvideo: frame 4 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 254/255 scr, last pts/stc/sof 1339705150/1343839068/1168
> > [  735.617515] uvcvideo: Frame complete (EOF found).
> > [  735.617516] uvcvideo: EOF in empty payload.
> > [  735.618973] uvcvideo: frame 5 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 1343861406/1347985615/1202
> > [  735.650846] uvcvideo: Frame complete (EOF found).
> > [  735.650847] uvcvideo: EOF in empty payload.
> > [  735.652307] uvcvideo: frame 6 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 1348017659/1352147749/1235
> > [  735.684178] uvcvideo: Frame complete (EOF found).
> > [  735.684179] uvcvideo: EOF in empty payload.
> > [  735.685639] uvcvideo: frame 7 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 254/255 scr, last pts/stc/sof 1352173915/1356309883/1268
> > [  735.717511] uvcvideo: Frame complete (EOF found).
> > [  735.717512] uvcvideo: EOF in empty payload.
> > [  735.718969] uvcvideo: frame 8 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 1356330172/1360456426/1302
> > [  735.750842] uvcvideo: Frame complete (EOF found).
> > [  735.750843] uvcvideo: EOF in empty payload.
> > [  735.752303] uvcvideo: frame 9 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 1360486426/1364618560/1335
> > [  735.784175] uvcvideo: Frame complete (EOF found).
> > [  735.784175] uvcvideo: EOF in empty payload.
> > [  735.784409] uvcvideo: uvc_ioctl_streamoff 1
> > [  735.787877] uvcvideo: uvc_v4l2_release
> > [  737.804700] uvcvideo: Suspending interface 1
> > [  737.804701] uvcvideo: Suspending interface 0
> > [  759.203616] uvcvideo: uvc_v4l2_open
> > [  759.299952] uvcvideo: Resuming interface 0
> > [  759.299953] uvcvideo: Resuming interface 1
> > [  759.300035] uvcvideo: Trying format 0x56595559 (YUYV): 1920x1080.
> > [  759.300036] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> > [  759.317823] uvcvideo: uvc_v4l2_mmap
> > [  759.317938] uvcvideo: uvc_v4l2_mmap
> > [  759.317998] uvcvideo: uvc_v4l2_mmap
> > [  759.318054] uvcvideo: uvc_v4l2_mmap
> > [  759.318108] uvcvideo: uvc_v4l2_mmap
> > [  759.318163] uvcvideo: uvc_v4l2_mmap
> > [  759.318217] uvcvideo: uvc_v4l2_mmap
> > [  759.318271] uvcvideo: uvc_v4l2_mmap
> > [  759.318331] uvcvideo: uvc_ioctl_streamon 1
> > [  759.318331] uvcvideo: uvc_ioctl_streamon 2
> > [  759.320968] uvcvideo: Allocated 5 URB buffers of 16x1024 bytes each.
> > [  792.216502] uvcvideo: uvc_v4l2_release
> > [  792.216709] xhci_hcd 0000:02:00.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.
> > [  794.720498] uvcvideo: Suspending interface 1
> > [  794.720500] uvcvideo: Suspending interface 0
> > [  806.281910] uvcvideo: uvc_v4l2_open
> > [  806.378953] uvcvideo: Resuming interface 0
> > [  806.378954] uvcvideo: Resuming interface 1
> > [  806.379036] uvcvideo: Trying format 0x56595559 (YUYV): 1920x1080.
> > [  806.379037] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> > [  806.396248] uvcvideo: uvc_v4l2_mmap
> > [  806.396356] uvcvideo: uvc_v4l2_mmap
> > [  806.396427] uvcvideo: uvc_v4l2_mmap
> > [  806.396496] uvcvideo: uvc_v4l2_mmap
> > [  806.396565] uvcvideo: uvc_v4l2_mmap
> > [  806.396634] uvcvideo: uvc_v4l2_mmap
> > [  806.396745] uvcvideo: uvc_v4l2_mmap
> > [  806.396821] uvcvideo: uvc_v4l2_mmap
> > [  806.396896] uvcvideo: uvc_ioctl_streamon 1
> > [  806.396896] uvcvideo: uvc_ioctl_streamon 2
> > [  806.399460] uvcvideo: Allocated 5 URB buffers of 16x1024 bytes each.
> > [  808.585707] uvcvideo: uvc_v4l2_release
> > [  810.589730] uvcvideo: Suspending interface 1
> > [  810.589732] uvcvideo: Suspending interface 0
> >
> > On Fri, Nov 25, 2022 at 4:53 PM Laurent Pinchart wrote:
> >
> >> Hi Amos,
> >>
> >> On Fri, Nov 25, 2022 at 03:11:22AM +0100, Amos Tibaldi wrote:
> >> > Hello, I blacklisted the snd_usb_audio and traced 0xffff uvcvideo.ko. The
> >> > problem has slightly changed. Now the frames are coming but are not shown,
> >> > as you can see from the syslog and dmesg below. Cheese, mpv, vlc, xawtv
> >> > show all black window
> >> >
> >> > tibaldi@ryzen:~/Desktop/src/svl2/SimpleV4L2-SimpleV4L2_v0.2.5/build$ xawtv
> >> > This is xawtv-3.106, running on Linux/x86_64 (5.4.212)
> >> > xinerama 0: 1920x1080+0+0
> >> > vid-open-auto: using grabber/webcam device /dev/video0
> >> > v4l2: oops: select timeout
> >>
> >> [snip]
> >>
> >> > [  686.740627] uvcvideo: Probing generic UVC device 3
> >> > [  686.742123] uvcvideo: Found format MJPEG.
> >> > [  686.742125] uvcvideo: - 1920x1080 (30.0 fps)
> >> > [  686.742126] uvcvideo: - 640x480 (30.0 fps)
> >> > [  686.742127] uvcvideo: - 800x600 (30.0 fps)
> >> > [  686.742128] uvcvideo: - 1024x768 (30.0 fps)
> >> > [  686.742129] uvcvideo: - 1280x720 (30.0 fps)
> >> > [  686.742130] uvcvideo: - 1280x960 (30.0 fps)
> >> > [  686.742130] uvcvideo: - 1280x1024 (30.0 fps)
> >> > [  686.742131] uvcvideo: - 1360x768 (30.0 fps)
> >> > [  686.742132] uvcvideo: - 1400x900 (30.0 fps)
> >> > [  686.742133] uvcvideo: - 1440x900 (30.0 fps)
> >> > [  686.742134] uvcvideo: Found format YUV 4:2:2 (YUYV).
> >> > [  686.742135] uvcvideo: - 1920x1080 (30.0 fps)
> >> > [  686.742135] uvcvideo: - 640x480 (30.0 fps)
> >> > [  686.742136] uvcvideo: - 800x600 (30.0 fps)
> >> > [  686.742137] uvcvideo: - 1024x768 (30.0 fps)
> >> > [  686.742138] uvcvideo: - 1280x720 (30.0 fps)
> >> > [  686.742139] uvcvideo: - 1280x960 (30.0 fps)
> >> > [  686.742140] uvcvideo: - 1280x1024 (30.0 fps)
> >> > [  686.742141] uvcvideo: - 1360x768 (30.0 fps)
> >> > [  686.742141] uvcvideo: - 1400x900 (30.0 fps)
> >> > [  686.742142] uvcvideo: - 1440x900 (30.0 fps)
> >> > [  686.742146] uvcvideo: Found a Status endpoint (addr 87).
> >> > [  686.742147] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> >> > [  686.742151] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/2 to device 3 entity 2
> >> > [  686.743061] uvcvideo: Adding mapping 'Brightness' to control 00000000-0000-0000-0000-000000000101/2.
> >> > [  686.743063] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/3 to device 3 entity 2
> >> > [  686.744306] uvcvideo: Adding mapping 'Contrast' to control 00000000-0000-0000-0000-000000000101/3.
> >> > [  686.744307] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/6 to device 3 entity 2
> >> > [  686.745557] uvcvideo: Adding mapping 'Hue' to control 00000000-0000-0000-0000-000000000101/6.
> >> > [  686.745558] uvcvideo: Added control 00000000-0000-0000-0000-000000000101/7 to device 3 entity 2
> >> > [  686.746808] uvcvideo: Adding mapping 'Saturation' to control 00000000-0000-0000-0000-000000000101/7.
> >> > [  686.746811] uvcvideo: Scanning UVC chain: OT 5 <- XU 4 <- XU 3 <- PU 2 <- IT 1
> >> > [  686.746814] uvcvideo: Found a valid video chain (1 -> 5).
> >> > [  686.759767] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input20
> >> > [  686.759814] uvcvideo: UVC device initialized.
> >> > [  686.759856] usbcore: registered new interface driver uvcvideo
> >> > [  686.759857] USB Video Class driver (1.1.1)
> >> > [  688.950588] uvcvideo: Suspending interface 1
> >> > [  688.950591] uvcvideo: Suspending interface 0
> >> > [  693.066866] uvcvideo: uvc_v4l2_open
> >> > [  693.164163] uvcvideo: Resuming interface 0
> >> > [  693.164164] uvcvideo: Resuming interface 1
> >> > [  693.164213] uvcvideo: uvc_v4l2_poll
> >> > [  693.164216] uvcvideo: uvc_v4l2_read: not implemented.
> >>
> >> That's an ancient API that the uvcvideo driver doesn't support. xawtv is
> >> likely a bad test application. Let's start simply, could you run
> >>
> >> yavta -f YUYV -s 1920x1080 -c10 /dev/video0
> >>
> >> and provide both the kernel log and the messages output by yavta ?
> >>
> >> > [  693.164220] uvcvideo: uvc_v4l2_poll
> >> > [  693.164221] uvcvideo: uvc_v4l2_read: not implemented.
> >> > [  693.164234] uvcvideo: uvc_v4l2_poll
> >> > [  693.164234] uvcvideo: uvc_v4l2_read: not implemented.
> >> > [  693.164240] uvcvideo: uvc_v4l2_poll
> >> > [  693.164241] uvcvideo: uvc_v4l2_read: not implemented.
> >> > [  693.167317] uvcvideo: uvc_v4l2_poll
> >> > [  693.167320] uvcvideo: uvc_v4l2_read: not implemented.
> >> > [  693.167887] uvcvideo: uvc_v4l2_open
> >> > [  693.167894] uvcvideo: uvc_ioctl_g_input 1
> >> > [  693.167895] uvcvideo: uvc_ioctl_enum_input 1
> >> > [  693.167903] uvcvideo: Trying format 0x32315559 (YU12): 1920x1080.
> >> > [  693.167904] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> >> > [  693.181968] uvcvideo: Trying format 0x32315559 (YU12): 1920x1080.
> >> > [  693.181970] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> >> > [  693.196719] uvcvideo: Trying format 0x32315659 (YV12): 1920x1080.
> >> > [  693.196721] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> >> > [  693.210226] uvcvideo: Trying format 0x50323234 (422P): 1920x1080.
> >> > [  693.210228] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> >> > [  693.224215] uvcvideo: Trying format 0x56595559 (YUYV): 1920x1080.
> >> > [  693.224217] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> >> > [  693.237715] uvcvideo: uvc_ioctl_g_parm 1
> >> > [  693.251341] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251460] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251536] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251602] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251660] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251715] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251768] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251821] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251873] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251925] uvcvideo: uvc_v4l2_mmap
> >> > [  693.251977] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252030] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252082] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252134] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252185] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252237] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252288] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252340] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252391] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252442] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252494] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252545] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252596] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252648] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252699] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252750] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252801] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252852] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252903] uvcvideo: uvc_v4l2_mmap
> >> > [  693.252954] uvcvideo: uvc_v4l2_mmap
> >> > [  693.253005] uvcvideo: uvc_v4l2_mmap
> >> > [  693.253056] uvcvideo: uvc_v4l2_mmap
> >> > [  693.253126] uvcvideo: uvc_ioctl_streamon 1
> >> > [  693.253126] uvcvideo: uvc_ioctl_streamon 2
> >> > [  693.255834] uvcvideo: Allocated 5 URB buffers of 16x1024 bytes each.
> >> > [  693.528952] uvcvideo: Frame complete (EOF found).
> >> > [  693.528953] uvcvideo: EOF in empty payload.
> >> > [  693.530411] uvcvideo: frame 1 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 532789400/536923291/88
> >> > [  693.562281] uvcvideo: Frame complete (EOF found).
> >> > [  693.562282] uvcvideo: EOF in empty payload.
> >> > [  693.563740] uvcvideo: frame 2 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 536945656/541069838/121
> >> > [  693.595614] uvcvideo: Frame complete (EOF found).
> >> > [  693.595615] uvcvideo: EOF in empty payload.
> >> > [  693.597074] uvcvideo: frame 3 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 541101909/545231972/154
> >> > [  693.628948] uvcvideo: Frame complete (EOF found).
> >> > [  693.628949] uvcvideo: EOF in empty payload.
> >> > [  693.630406] uvcvideo: frame 4 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 254/255 scr, last pts/stc/sof 545258164/549394108/188
> >> > [  693.662279] uvcvideo: Frame complete (EOF found).
> >> > [  693.662280] uvcvideo: EOF in empty payload.
> >> > .......
> >> > [  710.361665] uvcvideo: EOF in empty payload.
> >> > [  710.363124] uvcvideo: frame 506 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 2631698065/2635823538/534
> >> > [  710.394996] uvcvideo: Frame complete (EOF found).
> >> > [  710.394997] uvcvideo: EOF in empty payload.
> >> > [  710.396456] uvcvideo: frame 507 stats: 0/254/255 packets, 0/0/255 pts (!early initial), 253/255 scr, last pts/stc/sof 2635854320/2639985673/567
> >> > [  710.428329] uvcvideo: Frame complete (EOF found).
> >> > [  710.428330] uvcvideo: EOF in empty payload.
> >> > [  710.428407] uvcvideo: uvc_ioctl_streamoff 1
> >> > [  710.432808] uvcvideo: uvc_v4l2_release
> >> > [  710.435191] uvcvideo: uvc_v4l2_release
> >> > [  712.815575] uvcvideo: Suspending interface 1
> >> > [  712.815578] uvcvideo: Suspending interface 0
> >> >
> >> > On Fri, Nov 25, 2022 at 2:32 AM Laurent Pinchart wrote:
> >> >
> >> > > Hi Amos,
> >> > >
> >> > > Could you please avoid dropping the mailing list from CC when replying ?
> >> > >
> >> > > On Wed, Nov 23, 2022 at 09:43:10PM +0100, Amos Tibaldi wrote:
> >> > > > Hello, I attached the dmesg text file of one linux mint 20.1 that I have
> >> > > > just installed. The issue is the same. I hope it helps. Thanks.
> >> > >
> >> > > Quoting the interesting part from the log:
> >> > >
> >> > > > [  823.596518] usb 2-3: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
> >> > > > [  823.629237] usb 2-3: New USB device found, idVendor=1bcf, idProduct=2c99, bcdDevice= 2.00
> >> > > > [  823.629239] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> >> > > > [  823.629240] usb 2-3: Product: ezcap U3 capture
> >> > > > [  823.629241] usb 2-3: Manufacturer: VXIS Inc
> >> > >
> >> > > So far so good.
> >> > >
> >> > > > [  823.659423] mc: Linux media interface: v0.10
> >> > > > [  823.667890] videodev: Linux video capture interface: v2.00
> >> > > > [  823.678367] usb 2-3: 3:1: cannot get freq at ep 0x86
> >> > > > [  823.685869] usb 2-3: 3:2: cannot get freq at ep 0x86
> >> > > > [  823.692874] usb 2-3: 3:3: cannot get freq at ep 0x86
> >> > >
> >> > > This I don't like. I've seen many devices having trouble with the audio
> >> > > side, which resulted in different kind of firmware misbehaviours (most
> >> > > likely including crashes) that affected the video side. Could you try to
> >> > > blacklist the snd_usb_audio module to see if it helps ? It can be done
> >> > > by adding
> >> > >
> >> > > blacklist snd_usb_audio
> >> > >
> >> > > to /etc/modprobe.d/blacklist.conf
> >> > >
> >> > > > [  823.738250] usb 2-3: Warning! Unlikely big volume range (=4096), cval->res is probably wrong.
> >> > > > [  823.738252] usb 2-3: [5] FU [Digital In Capture Volume] ch = 1, val = 0/4096/1
> >> > > > [  823.738384] usbcore: registered new interface driver snd-usb-audio
> >> > > > [  823.740047] uvcvideo: Found UVC 1.00 device ezcap U3 capture (1bcf:2c99)
> >> > > > [  823.760905] input: ezcap U3 capture: ezcap U3 capt as /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-3/2-3:1.0/input/input17
> >> > > > [  823.760976] usbcore: registered new interface driver uvcvideo
> >> > > > [  823.760977] USB Video Class driver (1.1.1)
> >> > >
> >> > > Could you start video capture with any application and check if
> >> > > additional messages are then printed in the kernel log ?
> >> > >
> >> > > > On Wed, Nov 23, 2022 at 9:04 PM Laurent Pinchart wrote:
> >> > > >
> >> > > > > Hi Amos,
> >> > > > >
> >> > > > > CC'ing the linux-media mailing list.
> >> > > > >
> >> > > > > On Wed, Nov 23, 2022 at 07:16:05PM +0100, Amos Tibaldi wrote:
> >> > > > > > Hello,
> >> > > > > >    I have a usb framegrabber and it worked fine in ubuntu 20.04 and previous
> >> > > > > > releases of ubuntu with the uvcvideo.ko kernel module but now that I have
> >> > > > > > ubuntu 22.10 the uvcvideo.ko does not work with the ezcap261 framegrabber. The
> >> > > > > > ko is loaded but cheese or xawtv or vlc go on timeout when issuing video
> >> > > > > > acquisition, and the select returns wrong argument. I have also updated the
> >> > > > > > firmware of the framegrabber. What can I do?
> >> > > > >
> >> > > > > Could you please send a copy of the kernel log, in text form ? You can
> >> > > > > retrieve it with `dmesg` or `sudo dmesg`. I'm particularly interested in
> >> > > > > messages printed when the device is plugged in, or when an application
> >> > > > > attempts to use it.

-- 
Regards,

Laurent Pinchart

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-11-28 14:24 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <CAKAO289-s=VJYJzt5JBCSvAzHmG-KMY12yX-RMREQTQCHVe6YA@mail.gmail.com>
2022-11-23 20:04 ` request for help on uvcvideo driver issue Laurent Pinchart
     [not found]   ` <CAKAO28-5OPZgz=7oSr9qrU0KRB7=Tmfj_nM3DQP6rdgw61=YaQ@mail.gmail.com>
2022-11-25  1:32     ` Laurent Pinchart
     [not found]       ` <CAKAO289ZCUgpCmgOO8Oe3DNB60tLHvmRq_zu_zOmUkvO19C7OA@mail.gmail.com>
2022-11-25 15:53         ` Laurent Pinchart
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2022-11-28 14:24               ` Laurent Pinchart

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