LinuxQuestions.org
Visit the LQ Articles and Editorials section
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices

Reply
 
Search this Thread
Old 08-08-2008, 04:51 AM   #1
sadarax
Member
 
Registered: Sep 2005
Distribution: Ubuntu
Posts: 249

Rep: Reputation: 30
Lenovo Thinkpad T61 brightness inconsistency


I am running Kubuntu 8.04.1 on my Lenovo ThinkPad T61, and I have been having inconsistent screen brightness.

I set the brightness on my laptop to 100%, then I play a video and the screen brightness drops to 20%. When I press the brightness buttons, KDE thinks that it is still at 100%.

If I lower the brightness, it jumps up to that high level (say like 90%) and then I can push it back up to 100%.

While playing video, about every 30 seconds, the brightness drops back down to 20%, and it continues to do this no matter if I toggle-raise it back up.

Any time I do anything that affects the video display, such as a screen saver, the brightness also drops.

It started about 2 weeks ago (mid July 2008 ).

Hardware specs:
Video card: Intel GMA X3100 GM965

My video resolution is 1280x800. Here is my xorg.conf:
Code:
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
  Identifier  "Generic Keyboard"
  Driver    "kbd"
  Option    "XkbRules"  "xorg"
  Option    "XkbModel"  "pc105"
  Option    "XkbLayout" "us"
EndSection

Section "InputDevice"
  Identifier  "Configured Mouse"
  Driver    "mouse"
  Option    "CorePointer"
EndSection

Section "InputDevice"
  Identifier  "Synaptics Touchpad"
  Driver    "synaptics"
  Option    "SendCoreEvents"  "true"
  Option    "Device"    "/dev/psaux"
  Option    "Protocol"    "auto-dev"
  Option    "HorizEdgeScroll" "0"
EndSection

Section "Device"
  Identifier  "Configured Video Device"
EndSection

Section "Monitor"
  Identifier  "Configured Monitor"
EndSection

Section "Screen"
  Identifier  "Default Screen"
  Monitor   "Configured Monitor"
  Device    "Configured Video Device"
EndSection

Section "ServerLayout"
  Identifier  "Default Layout"
  Screen    "Default Screen"
  InputDevice "Synaptics Touchpad"
EndSection
 
  


Reply

Tags
brightness, lenovo, screen, t61, thinkpad


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
No dual display RHEL 5.1 on Lenovo T61 taz_Vtx Linux - Laptop and Netbook 1 10-03-2008 08:03 AM
IBM Thinkpad Lenovo T61 dial-up modem issues ironchefbilliam Linux - Hardware 1 06-02-2008 12:54 AM
Lenovo T61 users! Archer36 Slackware 6 04-03-2008 05:08 AM
brightness keys weird on debian sid thinkpad t61 GhostCow Debian 5 12-19-2007 06:30 AM
Thinkpad Lenovo T61 Nikosis Slackware 33 07-05-2007 06:11 AM


All times are GMT -5. The time now is 01:08 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration