Laptop screen remains dimmed after idle

Bug #996937 reported by Thomas Majewski on 2012-05-09
This bug affects 2 people
Affects Status Importance Assigned to Milestone
acpi (Ubuntu)

Bug Description

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

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in acpi (Ubuntu):
status: New → Confirmed
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