[Bugme-new] [Bug 12361] New: xbacklight doesn't change the display brightness on ThinkPad X61s

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=12361

           Summary: xbacklight doesn't change the display brightness on
                    ThinkPad X61s
           Product: ACPI
           Version: 2.5
     KernelVersion: 2.6.28
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Video
        AssignedTo: acpi_power-video at kernel-bugs.osdl.org
        ReportedBy: tino.keitel at web.de


Latest working kernel version: 2.6.27.8
Earliest failing kernel version: 2.6.28
Distribution: Debian Sid
Hardware Environment: ThinkPad X61s
Software Environment: Xorg 7.4
Problem Description: xbacklight doesn't change the display brightness

Steps to reproduce:

$ xbacklight
100.000000
$ xbacklight -set 10
$ xbacklight
6.666667
$

However, the actual brightness doesn't change.


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