Hi Christophe, > > SVN. Could you please try it with your setup ? Thanks. > > The module no longer causes that error, whether I set correctly the > framerate or not. However, with the same setup (running 2 instances of this > software), the second VIDIOC_STREAMON fails. Without trace, syslog reports: > > uvcvideo: Failed to submit isoc URB 0 (-28).
-28 is -ENOSPC, which means the driver can't allocate USB bandwidth. > I have put online a longer extract of syslog once I modprobed uvcvideo with > trace=65535 at: > http://christophe.gisquet.free.fr/syslog > > It may be the application doing again something silly. But it is strange > that the situation is exactly symmetrical: it is the order (the 2nd calls > always fails) and not the device that causes the problem. > > If you would like to hunt this bug and need more info, please ask. I'm > registered to the mailing list, so no need to Cc: me (and please leave the > Reply-To if it was present). There's not much I can do here. Two webcams at high resolutions in uncompressed mode exceed the USB bandwidth. Could you try using the MJPEG format ? Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
