I was browsing the v4l wiki at http://www.linuxtv.org/v4lwiki/index.php/Webcams
And it's written : "In the meantime, a patch is available to reset the webcam when a problem is detected. " concerning the bug in the firmware of the logitech cams... Does anyone have that patch ? is it a patch in the driver itself ? is it transparent (does it have a big impact on the video shown... stop for x seconds then restart .. or restart without the user noticing ) ? or is it just to close the device an reopend it when ioctl fails ? I would be very interested in any workaround possible..., if I can help in any way... Thanks Antoine On 11/30/06, Martin Rubli <[EMAIL PROTECTED]> wrote:
> When I plug the camera I get : > > [17204020.156000] 13:3:1: cannot set freq 0 to ep 0x86 > [17204021.156000] 13:3:2: cannot set freq 0 to ep 0x86 > [17204022.168000] 13:3:3: cannot get freq at ep 0x86 These three lines come from the USB audio driver and have nothing to do with uvcvideo, so no need to worry. > But if I try with luvcview it works properly,,, the problem is that after > starting stopping the camera a few times (10-20 times,,,) I get : > > [17204111.756000] uvcvideo: Failed to query (130) UVC control 1 (unit 0) > : -32. > [17204114.360000] uvcvideo: Failed to query (1) UVC control 1 (unit 0) : > -32. > [17204115.508000] uvcvideo: Failed to query (1) UVC control 1 (unit 0) : > -110. > > messages like these :( , and the camera stops working > > I've found > http://developer.berlios.de/bugs/?func=detailbug&bug_id=7605&group_id=5681 > > That seems to be similar,, it states hardware problems... but I'm not > sure it's the case here since if I remove the driver and reload it,, it > will work again.. It's indeed a hardware problem. If you're browsing through the mailing list archive you'll find quite a few threads about that problem. We're still looking for a good workaround for the UVC driver. Cheers, Martin
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