https://bugzilla.kernel.org/show_bug.cgi?id=16036

           Summary: Backlight control doesn't work on Toshiba T130
           Product: ACPI
           Version: 2.5
    Kernel Version: 2.6.34
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Video
        AssignedTo: [email protected]
        ReportedBy: [email protected]
        Regression: No


Created an attachment (id=26510)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=26510)
acpidump

When changing brightness using xbacklight or e.g. echo "3" >
/sys/class/backlight/acpi_video0/brightness the values in
/sys/class/backlight/acpi_video0/actual_brightness and /proc/acpi change, but
the actual backlight brightness does not change.

attaching acpidump

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