Public bug reported:
Recently upgraded from 10.10 to 12.04. After an idle period where the
backlight correctly turns off the backlight of my Toshiba L-300-D laptop
the backlight comes on but when I move the mouse or press a key however
the screen remains dimmed (grayed out) and stays that way for up to a
minute before the screen reappears. To ensure fan control works I boot
with " acpi_osi= " in the linux grub line. The screen used to
immediately undim and let me see the screen.
lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
3.2.0-24-generic-pae #37-Ubuntu SMP Wed Apr 25 10:47:59 UTC 2012 i686 athlon
i386 GNU/Linux
** Affects: acpi (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/996937
Title:
Laptop screen remains dimmed after idle
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