Hi Carmelo, On Saturday 02 August 2008, Carmelo Iannello wrote: > Laurent Pinchart ha scritto: > > I'm not sure what goes wrong. Like many webcams, the Hercules Dualpix > > doesn't implement the mandatory GET_DEF request on the video probe > > control, which results in the 'Failed to query' error message. This > > should not be fatal as the driver works around it, but it might confuse > > the webcam. > > You're right: I can get the webcam working with luvcview with or without > sending the GET_DEF request, so the driver works around it, the only visible > difference is the error msg.
I didn't know it was working in luvcview. That's an important piece of information. > It also seems to work with 'motion', but no luck with other programs, > like camorama, cheese, camstream or skype. camorama and camstream don't support v4l2 so they won't work with the uvcvideo driver. cheese uses gstreamer, which in theory should work. Make sure you use a recent version, as various bugs which made gstreamer not compatible with uvcvideo should have been fixed. As for skype, I really can't help. The software is proprietary and many people have encountered various issues when trying to use it, so I don't know which of skype or the driver/camera is to blame. > skype doesn't even print any error msg, it crashes and that's it. > It keeps crashing until I unload uvcvideo, very annoying. Does uvcvideo print any error message in the kernel log when skype crashes ? Either the driver crashes, in which case you will get a lengthy oops report in the kernel log, and the skype crash is then understandable, or skype has a bug that makes it crash. > > You could also try not to load the usbaudio driver at all. Timing-related > > issues that lead to a camera crash can be caused by many things, and > > audio-related requests could crash a perfectly working video device. > > No good news from this front. > > > Maybe the Hercules Dualpix uses a faulty USB chip (I would be interested > > in knowing the chip brand and model if you can manage to open the case > > without breaking anything). > > I don't have such a tiny screwdriver now, but in the case I'll let you > know. Ok. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
