Looks likely to be this. gnome-settings-daemon (3.2.0-0ubuntu4) oneiric; urgency=low * debian/patches/00git_dont_sleep_on_idle_by_default.patch: - Don't sleep on idle by default (LP: #860485) * debian/patches/00git_dont_revert_pre_idle_brigthness.patch: - Do not revert to the pre-idle brightness if idle dimming is disabled * debian/patches/50_add_dell_backlight.patch: - Add 'dell_backlight' module to gsd-backlight-helper (LP: #862474)
That's the only thing that changed on the 3rd/4th that looks relevant. No X or kernel packages changed; there was one change to compiz but it looks innocuous. So, probably a regression g-s-d. If you find the issue is still reproducible with current oneiric, you could maybe try downgrading to 3.2.0-0ubuntu3, and/or back out each of the changes to see which caused the vblank problem. ** Package changed: xserver-xorg-video-intel (Ubuntu) => gnome-settings- daemon (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/868684 Title: vblank counter failed - screen hung To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/868684/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp