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On 2013-06-22T00:09:50+00:00 Christoph Junghans wrote:

When unplugging the ac adapter on my thinkpad X230(x86_64 Gentoo Linux)
the screen doesn't get dimmed, even though the icon is changing. This
feature works on my older thinkpad X61(x86 Gentoo Linux), which is why I
realized it.

power-manager with --debug shows that the change in power supply is realized.
The thinkpad X230 has a "Intel Corporation 3rd Gen Core processor Graphics 
Controller" (lspci), which can be controlled via the acpi_video0 in 
/sys/class/backlight, but it also works via the intel_backlight interface 
(adding this to backlight_interfaces does not help.) Also the brightness plugin 
on the panel works and the fn keys work when xfce's volumed is running.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xfce4-power-
manager/+bug/1067749/comments/10


** Changed in: xfce4-power-manager (Gentoo Linux)
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/1067749

Title:
  Screen refuses to dim on battery

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