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From: Gregor Jasny <>
	Linux Media Mailing List <>,
	Hans Verkuil <>
Subject: Re: Bug#929262: libv4l-dev: pac207 cam(s) give frame decode errors
Date: Mon, 20 May 2019 13:38:56 +0200
Message-ID: <> (raw)
In-Reply-To: <155834073601.757.12828508994068038463.reportbug@scrollert>


On 20.05.19 10:25, wrote:
> Trying to get a pac207 camera to work with constatus.
> 2019-05-20 10:22:34.864900  INFO constatus [1-1] source v4l2 thread started
> libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: error unknown pac207 row header: 0x0000
> 2019-05-20 10:22:35.597949 ERROR cs:src_v4l2 [1-1] VIDIOC_DQBUF failed: Input/output error
> ioctl(VIDIOC_QBUF) failed
> errno: 22 (Invalid argument)
> To verify that it is not a constatus-problem I also tried a raspberry-pi camera via its video4linux-interface and that works fine.

According to the Linux Kernel Maintainers file the device driver is 
maintained by Hans, which I CC'ed on this bug report:

M:	Hans Verkuil <>
T:	git git://
S:	Odd Fixes
F:	drivers/media/usb/gspca/pac207.c

Did your camera ever work on another Kernel, CPU architecture, or 
v4l-utils version? Do you have anything suspicious in dmesg output?


       reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <155834073601.757.12828508994068038463.reportbug@scrollert>
2019-05-20 11:38 ` Gregor Jasny [this message]
2019-05-20 11:55   ` Hans Verkuil
2019-05-20 19:23     ` folkert

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