>> > luvcview then prints this out: >> > "Video driver: x11 >> > A window manager is available >> > video /dev/video0 >> > Unable to set format: 5. >> > Init v4L2 failed !! exit fatal" >> > Only solution I know to get back my video is to reboot the entire system >> > (annoying, so MS Win 3.1.). Anybody who knows how to get that v4l2 driver >> > working again without rebooting? >> >> I'm cc'ing Luc Saillard, an expert in terms of video and V4L2 ;-)
> I found a solution on mailing-list > https://lists.berlios.de/pipermail/linux-uvc-devel/ : > "the only way is to reset camera, either by calling usb_reset_device() or by > unplugging the cord." > The USB Logitech webcams appear to have a hardware bug (something about usb > timings) and as far as I understand it, there isn't a workaround for it. > Unplugging the cord of my webcam I can do but I'd like to know with what > command i can do a "usb_reset_device()". > I guess some experts on linux-uvc are Laurent Pinchart and Evgeny. There's a patch to linux-uvc that does the usb_reset_device when it seems necessary. Check the linux-uvc list for it. The latest version of the patch I could find was pretty old and the code has been completely shuffled since then (split into several files), so it took me some manual work to apply the patch. I posted the resulting new patch to the linux-uvc mailing-list recently (maybe a couple weeks ago). It seems to work for me. Stefan _______________________________________________ ekiga-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/ekiga-list
