[Bug 36257] New: backlight control not possible through xbacklight, xfce4-power-manager on Lenovo X120e (AMD E-350)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36257

           Summary: backlight control not possible through xbacklight,
                    xfce4-power-manager on Lenovo X120e (AMD E-350)
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: gottfried.haider at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=45655)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=45655)
xorg.log

When I trying to set the display brightness through xbacklight, I get:
"No outputs have backlight property"

Similarly, the backlight plugin in xfce4-power-manager says:
"No device found"

I can, however, successfully set the brightness of the LCD panel directly via
sysfs:

echo 1 >/sys/class/backlight/acpi_video0/brightness
echo 15 >/sys/class/backlight/acpi_video0/brightness


This is on an up to date xubuntu 11.04 Beta (xserver-xorg 7.6+4ubuntu3,
xserver-xorg-video-ati 6.14.0-0ubuntu4, kernel 2.6.39-rc3) on a Lenovo ThinkPad
X120e (Radeon HD 6310).

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