Bug 413031

Summary: ACPI brightness keys broken on Thinkpad T61p
Product: [Fedora] Fedora Reporter: Brian Long <brilong>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 8CC: katzj
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2008-03-11 17:43:12 EDT Type: ---
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Description Brian Long 2007-12-05 16:59:45 EST
Description of problem:
In Fedora8 latest kernel, I cannot use the brightness adjust keys of my Thinkpad
T61p laptop.

Version-Release number of selected component (if applicable):
kernel-2.6.23.8-63.fc8

How reproducible:
Always


Steps to Reproduce:
1. Grab a Thinkpad T61 or T61p
2. Press Fn+Home or Fn+End
3.

Actual Results:
Gnome brightness applet moves, but brightness does not change.

Expected Results:
Brightness of the LCD is changed and updated in GNOME brightness applet.

Additional info:
I noticed the ibm-acpi / thinkpad_acpi folks just released a patch which says it
fixes T61 and T61p issues.  It is located here:
http://sourceforge.net/project/showfiles.php?group_id=117042

I would like to know if you plan to port this into the 2.6.23.x kernel in Fedora
8 since it appears all T61 and T61p laptops are affected.  Thanks!
Comment 1 Chuck Ebbert 2008-02-05 20:29:29 EST
Try adding:

  acpi_osi="Linux"

to the kernel boot parameters...
Comment 2 petrosyan 2008-03-11 17:43:12 EDT

*** This bug has been marked as a duplicate of 363261 ***