[Bug 278611] New: Screen Brightness Control Doesn't Work on Nvidia Tegra 2 Device

[rdnetto at gmail.com]

https://bugs.kde.org/show_bug.cgi?id=278611

           Summary: Screen Brightness Control Doesn't Work on Nvidia Tegra
                    2 Device
           Product: kde
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: rdnetto at gmail.com


Version:           unspecified (using KDE 4.6.2) 
OS:                Linux

When I press the keys mapped to Raise/Lower Monitor Brightness (in System
Settings -> Shortcuts and Gestures -> Global Keyboard Shortcuts), nothing
happens. There is no onscreen display (like for the volume keys) and the
brightness doesn't change.

The same keys work under Gnome, and the brightness can be manually adjusted
with 'echo 200 >
/sys/devices/platform/pwm-backlight/backlight/pwm-backlight/brightness'.

Reproducible: Always

Steps to Reproduce:
Press the keys.

Actual Results:  
Nothing happens.

Expected Results:  
Screen brightness should change and an onscreen display indicate the change.

The device is an Asus Transformer, which uses the Nvidia Tegra 2 (ARM) chipset.
Discussed in forum here: http://forum.kde.org/viewtopic.php?f=66&t=96103

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