Hi Robert, On Wednesday 20 August 2008, Robert Watkins wrote: > Hi, > > I think I may have the same problem as detailed in > https://lists.berlios.de/pipermail/linux-uvc-devel/2008-July/003765.html > but I haven't got the space to fit an extra pci card. I'm hoping there is > another answer. > > The webcam appears to work excellently... > > [EMAIL PROTECTED]:~$ luvcview -d /dev/video1 > luvcview version 0.2.1 > Video driver: x11 > A window manager is available > video /dev/video1 > > until any application uses a USB microphone, i.e. > > [EMAIL PROTECTED]:~$ cat /dev/dsp4 > > then the picture breaks up, freezes and luvcview dies a few seconds later. > > [EMAIL PROTECTED]:~$ luvcview -d /dev/video1 > luvcview version 0.2.1 > Video driver: x11 > A window manager is available > video /dev/video1 > Ignoring empty buffer ... > Ignoring empty buffer ... > Ignoring empty buffer ... > Ignoring empty buffer ... > Unable to dequeue buffer (22). > Error grabbing > Clean Up done Quit > [EMAIL PROTECTED]:~$ > > I tried using a different USB microphone, i.e. cat /dev/dsp3, but it dies > just the same. I tried with and without USB hubs, but it dies just the > same. > > I tried the webcam in my old Toshiba Satellite laptop, and it doesn't > appear to have the problem. (Unfortunately 400MHz and 198M of ram is not > going to work well with Skype.) > > Any help would be greatly appreciated. > Will any USB webcam work for me and my box of ATI chips?
The short answer is: probably. Most webcam vendors test their products with Windows only (fortunately the situation is slowly evolving with Linux getting more vendor awareness - the Logitech webcam team getting is very Linux friendly). This leads to subtle timing-related bugs in the webcams to stay undetected when the cameras are used with Windows, but to crash the device when plugged into a Linux box. As the bugs are timing-related, the crashes frequency depends on the hardware configuration. Some Logitech webcams are known to suffer from such firmware bugs. There is unfortunately no fix. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
