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 backtrace. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
