I've verified that the bug also exists upstream as of 3.1-rc10. As a workaround, I've been booting with acpi=off, but this is far from ideal since in that condition my machine can't go into power-saving mode or run Unity 3D or Gnome Shell.
** Tags removed: needs-upstream-testing ** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/881166 Title: Backlight sometimes gets disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/881166/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
