I think I have found a workaround, for those running across this. I posted some info here, in this similar bug. https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/527157
The practical upshot of all this is that adding the kernel parameter acpi_backlight="vendor" seems to give me proper brightness levels across the board. There were some side effects, namely my screen would go to sleep (due to the power manager timer) and not wake up. I'd suggest setting your screen to never go to sleep unless you close the lid. This "fixed" the comatose screen issue for me. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/839281 Title: Double brightness events after logging in. To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-power/+bug/839281/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
