Hi Pablo,

On Monday 07 December 2009 18:18:11 Pablo Baena wrote:
> I get a kernel panic when running the attached sample code.
> I run it as:
> $ gcc capture.c -o capture
> $ export LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so
> $ ./capture -d/dev/video0 -c1000 -r
> -r tells it to capture using read(), which libv4l emulates.
> In the example code, I use read() to fetch from the webcam directly,
> without using select() to wait for a frame. In the v4l documentation,
> it states that read() should block until it has a new frame available.
> This is a Bus 002 Device 005: ID 0c45:62c0 Microdia Sonix USB 2.0 Camera.
> I can't capture the kernel panic because everything hangs and I have
> no kernel debugger to try to get that info. I attach a poor quality
> image taken with a webcam from the screen. I even tried having a
> vmware virtual machine to try to better capture the panic, but in the
> virtual machine it doesn't hang.
> This is Ubuntu 9.10, Linux pablo-laptop 2.6.31-16-generic #52-Ubuntu
> SMP Thu Dec 3 22:00:22 UTC 2009 i686 GNU/Linux.
> But I got reports that the same camera on Debian 5.3 is also panicking.
> Please advice if you need more information to solve this problem.

I can't reproduce the problem here (with another camera).

To investigate I will need a copy of the source code and binary kernel module 
for the uvcvideo driver running on your system as well as a complete complete 


Laurent Pinchart
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