I have this very same problem on the final release of 10.04 Lucid, Macbook Pro 5,3. And I can also confirm that on karmic it generally worked, but sometimes randomly failed, restarting indeed seemed to fix it. But now things appear completely broken.
I did not previously have isight-firmware-tools installed, but I installed it in an attempt to fix things, and later also followed the remove-install procedure on http://boxietuts.com/tutorials/hardware/getting-isight-to-work-on-ubuntu/ . All no effect. I get the same message as reported in the first post: [ 8.981596] uvcvideo: Found UVC 1.00 device Built-in iSight (05ac:8507) [ 8.981603] uvcvideo: No valid video chain found. I do *not* see the "unknown video" message as reported above.That would strike me as a different issue? I attach a verbose log of modprobe uvcvideo trace=15. ** Attachment added: "modprobe uvcvideo trace=15" http://launchpadlibrarian.net/47824620/uvcvideo_log.txt -- iSight webcam on Macbook Pro does not work https://bugs.launchpad.net/bugs/544469 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
