Re: [Linux-uvc-devel] rev 4 test with kernel smp Intel x86_64

[Laurent P. <lau...@sk...>]

Hi Michel,

> Just test the rev 4 with my HP zd8000 P4 64 bits 3Go with a smp kernel,
> graphic card ATI Mobility X600 and the uvcview SDL grabber
> the good news
> the driver work fine with all jpeg/size
> SDL yuv overlay never crash :)
> the bad news :
> driver return EIO on VIDIOC_DQBUF with all yuyv palette in my grabbing
> routine. SDL open a black screen but did not crash the box :)
> to be sure
> tested with my Athlon 2200+ Nvidia card, all size/palette are working like
> a charm .

-EIO means that the buffer has been marked as erroneous. Either because the 
URB completion handler received more data than expected or because it 
received a non-zero status. Could you check dmesg to see if it prints a debug 
message ? If not, please have a look at uvc_video_complete and add printks to 
see where it fails.

Laurent Pinchart