Bug 755685

Summary: Backlight contrl doesn't work on Lenovo laptop
Product: [Fedora] Fedora Reporter: Radek Vokál <rvokal>
Component: xorg-x11Assignee: X/OpenGL Maintenance List <xgl-maint>
Status: CLOSED WONTFIX QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 16CC: collura
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2013-02-26 15:14:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
Xorg.0.log
none
Smolt profile none

Description Radek Vokál 2011-11-21 19:11:19 UTC 
Description of problem:
The backlight on the Lenovo laptop screen is set apx to 50%. It can't be lowered nor increased. 

xbacklight -set 100 - doesn't work either
function keys - shows only 50% progressbar, it won't get higher or lower

The laptop worked fine with F15. The GPU is Radeon mobility.

Version-Release number of selected component (if applicable):
xorg-x11-server-Xorg-1.11.2-3.fc16.i686

Steps to Reproduce:
1. Try changing the backlight

  
Actual results:
Still same darkness

Expected results:
Light
Comment 1 Radek Vokál 2011-11-21 19:12:37 UTC 
Created attachment 534840 [details]
Xorg.0.log
Comment 2 Radek Vokál 2011-11-21 19:13:39 UTC 
Created attachment 534841 [details]
Smolt profile
Comment 3 Radek Vokál 2011-11-21 19:29:34 UTC 
Working with acpi directly works

[radek@localhost ~]$ ls /sys/class/backlight/*/brightness
/sys/class/backlight/acpi_video0/brightness
[radek@localhost ~]$ cat /sys/class/backlight/acpi_video0/brightness
2
[radek@localhost ~]$ cat /sys/class/backlight/acpi_video0/max_brightness 
7
[root@localhost radek]#  echo 7 > /sys/class/backlight/acpi_video0/brightness
Comment 4 Fedora End Of Life 2013-01-16 21:00:43 UTC 
This message is a reminder that Fedora 16 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 16. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
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'version' of '16'.

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Comment 5 Fedora End Of Life 2013-02-26 15:14:58 UTC 
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.