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* "dmxdev: DVB (dvb_dmxdev_filter_start): could not set feed" with two DVB sticks
@ 2019-01-10 20:42 F.M.
  2019-01-11 13:11 ` Mauro Carvalho Chehab
  0 siblings, 1 reply; 2+ messages in thread
From: F.M. @ 2019-01-10 20:42 UTC (permalink / raw)
  To: linux-media

Hi folks,

I’m trying to set up two DVB-adapters, one receiving a cable and the 
other a terrestrial signal. In the tests involved are the following 
adapters:

1.    TechnoTrend TVStick CT2-4400 (bus ID 0b48:3014)
2.    Hauppauge WinTV SoloHD (bus ID 2040:8268)

The system runs Debian buster with kernel 4.19.

dmesg output:
[Di Jan  8 12:45:41 2019] em28xx 1-4:1.0: New device HCW soloHD @ 480 
Mbps (2040:8268, interface 0, class 0)
[Di Jan  8 12:45:41 2019] em28xx 1-4:1.0: DVB interface 0 found: bulk
[Di Jan  8 12:45:41 2019] em28xx 1-4:1.0: chip ID is em28178
[Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: found a 'TechnoTrend 
TVStick CT2-4400' in warm state
[Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: will pass the complete 
MPEG2 transport stream to the software demuxer
[Di Jan  8 12:45:41 2019] dvbdev: DVB: registering new adapter 
(TechnoTrend TVStick CT2-4400)
[Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: MAC address: 
bc:ea:2b:44:0f:89
[Di Jan  8 12:45:41 2019] i2c i2c-6: Added multiplexed i2c bus 7
[Di Jan  8 12:45:41 2019] si2168 6-0064: Silicon Labs Si2168-B40 
successfully identified
[Di Jan  8 12:45:41 2019] si2168 6-0064: firmware version: B 4.0.2
[Di Jan  8 12:45:41 2019] si2157 7-0060: Silicon Labs 
Si2147/2148/2157/2158 successfully attached
[Di Jan  8 12:45:41 2019] usb 1-3: DVB: registering adapter 0 frontend 0 
(Silicon Labs Si2168)...
[Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: 'TechnoTrend TVStick 
CT2-4400' successfully initialized and connected
[Di Jan  8 12:45:41 2019] usbcore: registered new interface driver 
dvb_usb_dvbsky
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: EEPROM ID = 26 00 01 00, 
EEPROM hash = 0xccc2c180
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: EEPROM info:
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    microcode start address = 
0x0004, boot configuration = 0x01
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    AC97 audio (5 sample rates)
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    500mA max power
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    Table at offset 0x27, 
strings=0x0e6a, 0x1888, 0x087e
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: Identified as PCTV tripleStick 
(292e) (card=94)
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: dvb set to bulk mode.
[Di Jan  8 12:45:43 2019] usbcore: registered new interface driver em28xx
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: Binding DVB extension
[Di Jan  8 12:45:43 2019] i2c i2c-9: Added multiplexed i2c bus 10
[Di Jan  8 12:45:43 2019] si2168 9-0064: Silicon Labs Si2168-B40 
successfully identified
[Di Jan  8 12:45:43 2019] si2168 9-0064: firmware version: B 4.0.2
[Di Jan  8 12:45:43 2019] si2157 10-0060: Silicon Labs 
Si2147/2148/2157/2158 successfully attached
[Di Jan  8 12:45:43 2019] dvbdev: DVB: registering new adapter (1-4:1.0)
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: DVB: registering adapter 1 
frontend 0 (Silicon Labs Si2168)...
[Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: DVB extension successfully 
initialized
[Di Jan  8 12:45:43 2019] em28xx: Registered (Em28xx dvb Extension) 
extension
[Di Jan  8 12:45:45 2019] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full 
Duplex, Flow Control: Rx/Tx
[Di Jan  8 12:45:45 2019] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link 
becomes ready
[Di Jan  8 12:45:45 2019] si2168 6-0064: firmware: direct-loading 
firmware dvb-demod-si2168-b40-01.fw
[Di Jan  8 12:45:45 2019] si2168 6-0064: downloading firmware from file 
'dvb-demod-si2168-b40-01.fw'
[Di Jan  8 12:45:46 2019] si2168 6-0064: firmware version: B 4.0.11
[Di Jan  8 12:45:46 2019] si2157 7-0060: found a 'Silicon Labs Si2157-A30'
[Di Jan  8 12:45:46 2019] si2157 7-0060: firmware version: 3.0.5
[Di Jan  8 12:45:46 2019] si2168 9-0064: firmware: direct-loading 
firmware dvb-demod-si2168-b40-01.fw
[Di Jan  8 12:45:46 2019] si2168 9-0064: downloading firmware from file 
'dvb-demod-si2168-b40-01.fw'
[Di Jan  8 12:45:46 2019] si2168 9-0064: firmware version: B 4.0.11
[Di Jan  8 12:45:46 2019] si2157 10-0060: found a 'Silicon Labs Si2157-A30'
[Di Jan  8 12:45:46 2019] si2157 10-0060: firmware version: 3.0.5
[Di Jan  8 12:46:46 2019] dmxdev: DVB (dvb_dmxdev_filter_start): could 
not set feed
[Di Jan  8 12:46:46 2019] dvb_demux: dvb_demux_feed_del: feed not in 
list (type=1 state=0 pid=ffff)

Both adapters work fine individually but together the two last lines 
occur and VDR only receives a signal on one of them while the other 
gives "no data" message. When i.e. I add the first tuner later I get 
such messages in the journal:

Jan 08 12:36:08 mypc kernel:  device_create_groups_vargs+0xd1/0xf0
Jan 08 12:36:08 mypc kernel:  device_create+0x49/0x60
Jan 08 12:36:08 mypc kernel:  ? _cond_resched+0x15/0x30
Jan 08 12:36:08 mypc kernel:  ? kmem_cache_alloc_trace+0x155/0x1d0
Jan 08 12:36:08 mypc kernel:  dvb_register_device+0x229/0x2c0 [dvb_core]
Jan 08 12:36:08 mypc kernel:  dvb_usbv2_probe+0x54d/0x10d0 [dvb_usb_v2]
Jan 08 12:36:08 mypc kernel:  ? __pm_runtime_set_status+0x247/0x260
Jan 08 12:36:08 mypc kernel:  usb_probe_interface+0xe4/0x2f0 [usbcore]
Jan 08 12:36:08 mypc kernel:  really_probe+0x235/0x3a0
Jan 08 12:36:08 mypc kernel:  driver_probe_device+0xb3/0xf0
Jan 08 12:36:08 mypc kernel:  __driver_attach+0xdd/0x110
Jan 08 12:36:08 mypc kernel:  ? driver_probe_device+0xf0/0xf0
Jan 08 12:36:08 mypc kernel:  bus_for_each_dev+0x76/0xc0
Jan 08 12:36:08 mypc kernel:  ? klist_add_tail+0x3b/0x70
Jan 08 12:36:08 mypc kernel:  bus_add_driver+0x152/0x230
Jan 08 12:36:08 mypc kernel:  driver_register+0x6b/0xb0
Jan 08 12:36:08 mypc kernel:  usb_register_driver+0x7a/0x130 [usbcore]
Jan 08 12:36:08 mypc kernel:  ? 0xffffffffc09e5000
Jan 08 12:36:08 mypc kernel:  do_one_initcall+0x46/0x1c3
Jan 08 12:36:08 mypc kernel:  ? free_unref_page_commit+0x91/0x100
Jan 08 12:36:08 mypc kernel:  ? _cond_resched+0x15/0x30
Jan 08 12:36:08 mypc kernel:  ? kmem_cache_alloc_trace+0x155/0x1d0
Jan 08 12:36:08 mypc kernel:  do_init_module+0x5a/0x210
Jan 08 12:36:08 mypc kernel:  load_module+0x215c/0x2380
Jan 08 12:36:08 mypc kernel:  ? __do_sys_finit_module+0xad/0x110
Jan 08 12:36:08 mypc kernel:  __do_sys_finit_module+0xad/0x110
Jan 08 12:36:08 mypc kernel:  do_syscall_64+0x53/0x100
Jan 08 12:36:08 mypc kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
Jan 08 12:36:08 mypc kernel: RIP: 0033:0x7f3029f62309
Jan 08 12:36:08 mypc kernel: Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 
0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 
8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
Jan 08 12:36:08 mypc kernel: RSP: 002b:00007ffefc69b4c8 EFLAGS: 00000246 
ORIG_RAX: 0000000000000139
Jan 08 12:36:08 mypc kernel: RAX: ffffffffffffffda RBX: 0000555d0528bde0 
RCX: 00007f3029f62309
Jan 08 12:36:08 mypc kernel: RDX: 0000000000000000 RSI: 0000555d0528ebd0 
RDI: 0000000000000006
Jan 08 12:36:08 mypc kernel: RBP: 0000555d0528ebd0 R08: 0000000000000000 
R09: 0000000000000000
Jan 08 12:36:08 mypc kernel: R10: 0000000000000006 R11: 0000000000000246 
R12: 0000000000000000
Jan 08 12:36:08 mypc kernel: R13: 0000555d0528be60 R14: 0000000000040000 
R15: 0000555d0528bde0
Jan 08 12:36:08 mypc kernel: kobject_add_internal failed for dvb with 
-EEXIST, don't try to register things with the same name in the same 
directory.
Jan 08 12:36:08 mypc kernel: dvbdev: dvb_register_device: failed to 
create device dvb0.net0 (-17)
Jan 08 12:36:08 mypc kernel: usb 1-3: dvb_usb_v2: dvb_net_init() failed=-17
Jan 08 12:36:08 mypc kernel: dvb_usb_dvbsky: probe of 1-3:1.0 failed 
with error -17

As I thought that the different modules (dvb_usb_dvbsky and em28xx) are 
the cause I ordered a new device which use the same chips:

3. DVBSky T330 (bus ID 0572:0320).

The error messages still show up:

[Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: found a 'DVBSky T330' in 
warm state
[Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: will pass the complete 
MPEG2 transport stream to the software demuxer
[Mi Jan  9 21:59:48 2019] dvbdev: DVB: registering new adapter (DVBSky T330)
[Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: MAC address: 
00:cc:10:a5:33:0c
[Mi Jan  9 21:59:48 2019] i2c i2c-6: Added multiplexed i2c bus 7
[Mi Jan  9 21:59:48 2019] si2168 6-0064: Silicon Labs Si2168-B40 
successfully identified
[Mi Jan  9 21:59:48 2019] si2168 6-0064: firmware version: B 4.0.2
[Mi Jan  9 21:59:48 2019] media: Linux media interface: v0.10
[Mi Jan  9 21:59:48 2019] si2157 7-0060: Silicon Labs 
Si2147/2148/2157/2158 successfully attached
[Mi Jan  9 21:59:48 2019] usb 1-3: DVB: registering adapter 0 frontend 0 
(Silicon Labs Si2168)...
[Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: 'DVBSky T330' 
successfully initialized and connected
[Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: found a 'TechnoTrend 
TVStick CT2-4400' in warm state
[Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: will pass the complete 
MPEG2 transport stream to the software demuxer
[Mi Jan  9 21:59:48 2019] dvbdev: DVB: registering new adapter 
(TechnoTrend TVStick CT2-4400)
[Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: MAC address: 
bc:ea:2b:44:0f:89
[Mi Jan  9 21:59:48 2019] i2c i2c-8: Added multiplexed i2c bus 9
[Mi Jan  9 21:59:48 2019] si2168 8-0064: Silicon Labs Si2168-B40 
successfully identified
[Mi Jan  9 21:59:48 2019] si2168 8-0064: firmware version: B 4.0.2
[Mi Jan  9 21:59:48 2019] si2157 9-0060: Silicon Labs 
Si2147/2148/2157/2158 successfully attached
[Mi Jan  9 21:59:48 2019] usb 1-4: DVB: registering adapter 1 frontend 0 
(Silicon Labs Si2168)...
[Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: 'TechnoTrend TVStick 
CT2-4400' successfully initialized and connected
[Mi Jan  9 21:59:48 2019] usbcore: registered new interface driver 
dvb_usb_dvbsky
[Mi Jan  9 22:00:03 2019] si2168 6-0064: firmware: direct-loading 
firmware dvb-demod-si2168-b40-01.fw
[Mi Jan  9 22:00:03 2019] si2168 6-0064: downloading firmware from file 
'dvb-demod-si2168-b40-01.fw'
[Mi Jan  9 22:00:03 2019] si2168 6-0064: firmware version: B 4.0.11
[Mi Jan  9 22:00:03 2019] si2157 7-0060: found a 'Silicon Labs Si2157-A30'
[Mi Jan  9 22:00:04 2019] si2157 7-0060: firmware version: 3.0.5
[Mi Jan  9 22:00:04 2019] si2168 8-0064: firmware: direct-loading 
firmware dvb-demod-si2168-b40-01.fw
[Mi Jan  9 22:00:04 2019] si2168 8-0064: downloading firmware from file 
'dvb-demod-si2168-b40-01.fw'
[Mi Jan  9 22:00:04 2019] si2168 8-0064: firmware version: B 4.0.11
[Mi Jan  9 22:00:04 2019] si2157 9-0060: found a 'Silicon Labs Si2157-A30'
[Mi Jan  9 22:00:04 2019] si2157 9-0060: firmware version: 3.0.5
[Mi Jan  9 22:00:04 2019] fuse init (API version 7.28)
[Mi Jan  9 22:01:01 2019] dmxdev: DVB (dvb_dmxdev_filter_start): could 
not set feed
[Mi Jan  9 22:01:01 2019] dvb_demux: dvb_demux_feed_del: feed not in 
list (type=1 state=0 pid=ffff)

Now I'd like to know if this is an driver limitation or is there 
anything I could set up differently in order to make it work (except for 
disabling the remotes I didn't set any parameters than standard).

Regards, Frank



^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: "dmxdev: DVB (dvb_dmxdev_filter_start): could not set feed" with two DVB sticks
  2019-01-10 20:42 "dmxdev: DVB (dvb_dmxdev_filter_start): could not set feed" with two DVB sticks F.M.
@ 2019-01-11 13:11 ` Mauro Carvalho Chehab
  0 siblings, 0 replies; 2+ messages in thread
From: Mauro Carvalho Chehab @ 2019-01-11 13:11 UTC (permalink / raw)
  To: F.M.; +Cc: linux-media

Em Thu, 10 Jan 2019 21:42:27 +0100
"F.M." <moeses@freenet.de> escreveu:

> Hi folks,
> 
> I’m trying to set up two DVB-adapters, one receiving a cable and the 
> other a terrestrial signal. In the tests involved are the following 
> adapters:
> 
> 1.    TechnoTrend TVStick CT2-4400 (bus ID 0b48:3014)
> 2.    Hauppauge WinTV SoloHD (bus ID 2040:8268)
> 
> The system runs Debian buster with kernel 4.19.
> 
> dmesg output:
> [Di Jan  8 12:45:41 2019] em28xx 1-4:1.0: New device HCW soloHD @ 480 
> Mbps (2040:8268, interface 0, class 0)
> [Di Jan  8 12:45:41 2019] em28xx 1-4:1.0: DVB interface 0 found: bulk
> [Di Jan  8 12:45:41 2019] em28xx 1-4:1.0: chip ID is em28178
> [Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: found a 'TechnoTrend 
> TVStick CT2-4400' in warm state
> [Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: will pass the complete 
> MPEG2 transport stream to the software demuxer
> [Di Jan  8 12:45:41 2019] dvbdev: DVB: registering new adapter 
> (TechnoTrend TVStick CT2-4400)
> [Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: MAC address: 
> bc:ea:2b:44:0f:89
> [Di Jan  8 12:45:41 2019] i2c i2c-6: Added multiplexed i2c bus 7
> [Di Jan  8 12:45:41 2019] si2168 6-0064: Silicon Labs Si2168-B40 
> successfully identified
> [Di Jan  8 12:45:41 2019] si2168 6-0064: firmware version: B 4.0.2
> [Di Jan  8 12:45:41 2019] si2157 7-0060: Silicon Labs 
> Si2147/2148/2157/2158 successfully attached
> [Di Jan  8 12:45:41 2019] usb 1-3: DVB: registering adapter 0 frontend 0 
> (Silicon Labs Si2168)...
> [Di Jan  8 12:45:41 2019] usb 1-3: dvb_usb_v2: 'TechnoTrend TVStick 
> CT2-4400' successfully initialized and connected
> [Di Jan  8 12:45:41 2019] usbcore: registered new interface driver 
> dvb_usb_dvbsky
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: EEPROM ID = 26 00 01 00, 
> EEPROM hash = 0xccc2c180
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: EEPROM info:
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    microcode start address = 
> 0x0004, boot configuration = 0x01
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    AC97 audio (5 sample rates)
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    500mA max power
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0:    Table at offset 0x27, 
> strings=0x0e6a, 0x1888, 0x087e
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: Identified as PCTV tripleStick 
> (292e) (card=94)
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: dvb set to bulk mode.
> [Di Jan  8 12:45:43 2019] usbcore: registered new interface driver em28xx
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: Binding DVB extension
> [Di Jan  8 12:45:43 2019] i2c i2c-9: Added multiplexed i2c bus 10
> [Di Jan  8 12:45:43 2019] si2168 9-0064: Silicon Labs Si2168-B40 
> successfully identified
> [Di Jan  8 12:45:43 2019] si2168 9-0064: firmware version: B 4.0.2
> [Di Jan  8 12:45:43 2019] si2157 10-0060: Silicon Labs 
> Si2147/2148/2157/2158 successfully attached
> [Di Jan  8 12:45:43 2019] dvbdev: DVB: registering new adapter (1-4:1.0)
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: DVB: registering adapter 1 
> frontend 0 (Silicon Labs Si2168)...
> [Di Jan  8 12:45:43 2019] em28xx 1-4:1.0: DVB extension successfully 
> initialized
> [Di Jan  8 12:45:43 2019] em28xx: Registered (Em28xx dvb Extension) 
> extension
> [Di Jan  8 12:45:45 2019] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full 
> Duplex, Flow Control: Rx/Tx
> [Di Jan  8 12:45:45 2019] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link 
> becomes ready
> [Di Jan  8 12:45:45 2019] si2168 6-0064: firmware: direct-loading 
> firmware dvb-demod-si2168-b40-01.fw
> [Di Jan  8 12:45:45 2019] si2168 6-0064: downloading firmware from file 
> 'dvb-demod-si2168-b40-01.fw'
> [Di Jan  8 12:45:46 2019] si2168 6-0064: firmware version: B 4.0.11
> [Di Jan  8 12:45:46 2019] si2157 7-0060: found a 'Silicon Labs Si2157-A30'
> [Di Jan  8 12:45:46 2019] si2157 7-0060: firmware version: 3.0.5
> [Di Jan  8 12:45:46 2019] si2168 9-0064: firmware: direct-loading 
> firmware dvb-demod-si2168-b40-01.fw
> [Di Jan  8 12:45:46 2019] si2168 9-0064: downloading firmware from file 
> 'dvb-demod-si2168-b40-01.fw'
> [Di Jan  8 12:45:46 2019] si2168 9-0064: firmware version: B 4.0.11
> [Di Jan  8 12:45:46 2019] si2157 10-0060: found a 'Silicon Labs Si2157-A30'
> [Di Jan  8 12:45:46 2019] si2157 10-0060: firmware version: 3.0.5
> [Di Jan  8 12:46:46 2019] dmxdev: DVB (dvb_dmxdev_filter_start): could 
> not set feed
> [Di Jan  8 12:46:46 2019] dvb_demux: dvb_demux_feed_del: feed not in 
> list (type=1 state=0 pid=ffff)
> 
> Both adapters work fine individually but together the two last lines 
> occur and VDR only receives a signal on one of them while the other 
> gives "no data" message. When i.e. I add the first tuner later I get 
> such messages in the journal:
> 
> Jan 08 12:36:08 mypc kernel:  device_create_groups_vargs+0xd1/0xf0
> Jan 08 12:36:08 mypc kernel:  device_create+0x49/0x60
> Jan 08 12:36:08 mypc kernel:  ? _cond_resched+0x15/0x30
> Jan 08 12:36:08 mypc kernel:  ? kmem_cache_alloc_trace+0x155/0x1d0
> Jan 08 12:36:08 mypc kernel:  dvb_register_device+0x229/0x2c0 [dvb_core]
> Jan 08 12:36:08 mypc kernel:  dvb_usbv2_probe+0x54d/0x10d0 [dvb_usb_v2]
> Jan 08 12:36:08 mypc kernel:  ? __pm_runtime_set_status+0x247/0x260
> Jan 08 12:36:08 mypc kernel:  usb_probe_interface+0xe4/0x2f0 [usbcore]
> Jan 08 12:36:08 mypc kernel:  really_probe+0x235/0x3a0
> Jan 08 12:36:08 mypc kernel:  driver_probe_device+0xb3/0xf0
> Jan 08 12:36:08 mypc kernel:  __driver_attach+0xdd/0x110
> Jan 08 12:36:08 mypc kernel:  ? driver_probe_device+0xf0/0xf0
> Jan 08 12:36:08 mypc kernel:  bus_for_each_dev+0x76/0xc0
> Jan 08 12:36:08 mypc kernel:  ? klist_add_tail+0x3b/0x70
> Jan 08 12:36:08 mypc kernel:  bus_add_driver+0x152/0x230
> Jan 08 12:36:08 mypc kernel:  driver_register+0x6b/0xb0
> Jan 08 12:36:08 mypc kernel:  usb_register_driver+0x7a/0x130 [usbcore]
> Jan 08 12:36:08 mypc kernel:  ? 0xffffffffc09e5000
> Jan 08 12:36:08 mypc kernel:  do_one_initcall+0x46/0x1c3
> Jan 08 12:36:08 mypc kernel:  ? free_unref_page_commit+0x91/0x100
> Jan 08 12:36:08 mypc kernel:  ? _cond_resched+0x15/0x30
> Jan 08 12:36:08 mypc kernel:  ? kmem_cache_alloc_trace+0x155/0x1d0
> Jan 08 12:36:08 mypc kernel:  do_init_module+0x5a/0x210
> Jan 08 12:36:08 mypc kernel:  load_module+0x215c/0x2380
> Jan 08 12:36:08 mypc kernel:  ? __do_sys_finit_module+0xad/0x110
> Jan 08 12:36:08 mypc kernel:  __do_sys_finit_module+0xad/0x110
> Jan 08 12:36:08 mypc kernel:  do_syscall_64+0x53/0x100
> Jan 08 12:36:08 mypc kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
> Jan 08 12:36:08 mypc kernel: RIP: 0033:0x7f3029f62309
> Jan 08 12:36:08 mypc kernel: Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 
> 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 
> 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
> Jan 08 12:36:08 mypc kernel: RSP: 002b:00007ffefc69b4c8 EFLAGS: 00000246 
> ORIG_RAX: 0000000000000139
> Jan 08 12:36:08 mypc kernel: RAX: ffffffffffffffda RBX: 0000555d0528bde0 
> RCX: 00007f3029f62309
> Jan 08 12:36:08 mypc kernel: RDX: 0000000000000000 RSI: 0000555d0528ebd0 
> RDI: 0000000000000006
> Jan 08 12:36:08 mypc kernel: RBP: 0000555d0528ebd0 R08: 0000000000000000 
> R09: 0000000000000000
> Jan 08 12:36:08 mypc kernel: R10: 0000000000000006 R11: 0000000000000246 
> R12: 0000000000000000
> Jan 08 12:36:08 mypc kernel: R13: 0000555d0528be60 R14: 0000000000040000 
> R15: 0000555d0528bde0
> Jan 08 12:36:08 mypc kernel: kobject_add_internal failed for dvb with 
> -EEXIST, don't try to register things with the same name in the same 
> directory.
> Jan 08 12:36:08 mypc kernel: dvbdev: dvb_register_device: failed to 
> create device dvb0.net0 (-17)
> Jan 08 12:36:08 mypc kernel: usb 1-3: dvb_usb_v2: dvb_net_init() failed=-17
> Jan 08 12:36:08 mypc kernel: dvb_usb_dvbsky: probe of 1-3:1.0 failed 
> with error -17

Could you please post the full dmesg? What I suspect is that you may
have some trouble with the USB (yet, it should not be crashing).

Perhaps your chipset is not providing enough power via USB for
both devices and the device is getting unregistered and re-registered.

> As I thought that the different modules (dvb_usb_dvbsky and em28xx) are 
> the cause I ordered a new device which use the same chips:
> 
> 3. DVBSky T330 (bus ID 0572:0320).
> 
> The error messages still show up:
> 
> [Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: found a 'DVBSky T330' in 
> warm state
> [Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: will pass the complete 
> MPEG2 transport stream to the software demuxer
> [Mi Jan  9 21:59:48 2019] dvbdev: DVB: registering new adapter (DVBSky T330)
> [Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: MAC address: 
> 00:cc:10:a5:33:0c
> [Mi Jan  9 21:59:48 2019] i2c i2c-6: Added multiplexed i2c bus 7
> [Mi Jan  9 21:59:48 2019] si2168 6-0064: Silicon Labs Si2168-B40 
> successfully identified
> [Mi Jan  9 21:59:48 2019] si2168 6-0064: firmware version: B 4.0.2
> [Mi Jan  9 21:59:48 2019] media: Linux media interface: v0.10
> [Mi Jan  9 21:59:48 2019] si2157 7-0060: Silicon Labs 
> Si2147/2148/2157/2158 successfully attached
> [Mi Jan  9 21:59:48 2019] usb 1-3: DVB: registering adapter 0 frontend 0 
> (Silicon Labs Si2168)...
> [Mi Jan  9 21:59:48 2019] usb 1-3: dvb_usb_v2: 'DVBSky T330' 
> successfully initialized and connected
> [Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: found a 'TechnoTrend 
> TVStick CT2-4400' in warm state
> [Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: will pass the complete 
> MPEG2 transport stream to the software demuxer
> [Mi Jan  9 21:59:48 2019] dvbdev: DVB: registering new adapter 
> (TechnoTrend TVStick CT2-4400)
> [Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: MAC address: 
> bc:ea:2b:44:0f:89
> [Mi Jan  9 21:59:48 2019] i2c i2c-8: Added multiplexed i2c bus 9
> [Mi Jan  9 21:59:48 2019] si2168 8-0064: Silicon Labs Si2168-B40 
> successfully identified
> [Mi Jan  9 21:59:48 2019] si2168 8-0064: firmware version: B 4.0.2
> [Mi Jan  9 21:59:48 2019] si2157 9-0060: Silicon Labs 
> Si2147/2148/2157/2158 successfully attached
> [Mi Jan  9 21:59:48 2019] usb 1-4: DVB: registering adapter 1 frontend 0 
> (Silicon Labs Si2168)...
> [Mi Jan  9 21:59:48 2019] usb 1-4: dvb_usb_v2: 'TechnoTrend TVStick 
> CT2-4400' successfully initialized and connected
> [Mi Jan  9 21:59:48 2019] usbcore: registered new interface driver 
> dvb_usb_dvbsky
> [Mi Jan  9 22:00:03 2019] si2168 6-0064: firmware: direct-loading 
> firmware dvb-demod-si2168-b40-01.fw
> [Mi Jan  9 22:00:03 2019] si2168 6-0064: downloading firmware from file 
> 'dvb-demod-si2168-b40-01.fw'
> [Mi Jan  9 22:00:03 2019] si2168 6-0064: firmware version: B 4.0.11
> [Mi Jan  9 22:00:03 2019] si2157 7-0060: found a 'Silicon Labs Si2157-A30'
> [Mi Jan  9 22:00:04 2019] si2157 7-0060: firmware version: 3.0.5
> [Mi Jan  9 22:00:04 2019] si2168 8-0064: firmware: direct-loading 
> firmware dvb-demod-si2168-b40-01.fw
> [Mi Jan  9 22:00:04 2019] si2168 8-0064: downloading firmware from file 
> 'dvb-demod-si2168-b40-01.fw'
> [Mi Jan  9 22:00:04 2019] si2168 8-0064: firmware version: B 4.0.11
> [Mi Jan  9 22:00:04 2019] si2157 9-0060: found a 'Silicon Labs Si2157-A30'
> [Mi Jan  9 22:00:04 2019] si2157 9-0060: firmware version: 3.0.5
> [Mi Jan  9 22:00:04 2019] fuse init (API version 7.28)
> [Mi Jan  9 22:01:01 2019] dmxdev: DVB (dvb_dmxdev_filter_start): could 
> not set feed
> [Mi Jan  9 22:01:01 2019] dvb_demux: dvb_demux_feed_del: feed not in 
> list (type=1 state=0 pid=ffff)
> 
> Now I'd like to know if this is an driver limitation or is there 
> anything I could set up differently in order to make it work (except for 
> disabling the remotes I didn't set any parameters than standard).

There is a limit when multiple USB devices are used, with is the
maximum USB bandwidth. Several systems share a single USB bus with
multiple USB ports. That limits the maximum number of slots that can
be allocated for ISOC traffic, but this affects more analog TV
(with uses uncompressed frames). With em28xx driver, a 640x480
video with 30 frames per second and 16 bits per pixel is enough
to reserve 60% of the maximum allowed number of frames for ISOC on
a USB bus. That produces a ~140 MBps trafic[1]. So, if one wants 
multiple USB cards, he has to either reduce the resolution or be
sure that the second card is on a separate USB bus.

[1] You may think that this is a way below the 480 Mbps "official"
limit for USB, but the USB spec actually limits the number of
packets per second. So, if a device is not using the maximum
packet size, the limit is a way below the maximum.

With Digital TV, as the the bit rate per a MPEG-TS stream is at
the range of 20 Mbps to 50 Mbps, usually you can have more
USB devices working at the same time [2].

[2] At least on x86_64 machines. I've seen a lot of problems
on arm, due to broken USB hosts/host drivers. The Rasperry Pi
USB host, for example, has problems even with just one device.

Thanks,
Mauro

^ permalink raw reply	[flat|nested] 2+ messages in thread

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Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-10 20:42 "dmxdev: DVB (dvb_dmxdev_filter_start): could not set feed" with two DVB sticks F.M.
2019-01-11 13:11 ` Mauro Carvalho Chehab

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