brightness problem acer aspire 5745-dg

Bug #994558 reported by peter giannoumis on 2012-05-04
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Medium
Unassigned

Bug Description

Hello guys.I am new in ubuntu and i bought a brand new laptop acer aspire 5745-dg with windows but i put and ubuntu together.My problem is that the brightness changes from windows but i cannot change it inside ubuntu,for example the fn keys don't work and i cant change the brightness from power management too.The funny part is that the fn keys for the sound work great!My problem is that the brightness is always at maximun as a result to reduce my battery life!!I have reported this problem to many sites but noone could help me..:/I have already tried to change some lines in grub but nothing changed.I also have heared that this might be a bios problem...Can you please help me with this serious problem???I would appriciate that!!!

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
Date: Fri May 4 15:39:12 2012
DistroCodename: precise
DistroVariant: ubuntu
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=el_GR.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

peter giannoumis (p3t3-maister) wrote :
affects: unity (Ubuntu) → ubuntu
affects: ubuntu → acpi-support (Ubuntu)
Steve Langasek (vorlon) on 2012-05-07
affects: acpi-support (Ubuntu) → linux (Ubuntu)

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 994558

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Changed in linux (Ubuntu):
importance: Undecided → Medium
Joseph Salisbury (jsalisbury) wrote :

Can you try booting with the option:
acpi_backlight=vendor

This may be a duplicate of bug 941286

Launchpad Janitor (janitor) wrote :

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

Changed in linux (Ubuntu):
status: Incomplete → Expired
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