https://bugs.freedesktop.org/show_bug.cgi?id=65377
Priority: medium
Bug ID: 65377
Assignee: dri-devel@lists.freedesktop.org
Summary: Backlight control via /sys/class/backlight/radeon_bl0
not working
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: bastian.tril...@gmail.com
Hardware: x86-64 (AMD64)
Status: NEW
Version: XOrg CVS
Component: DRM/Radeon
Product: DRI
This is a Macbook pro 8,2 with an Intel HD Graphics 3000 [8086:0116] and an AMD
Radeon HD 6750M [1002:6741].
The backlight interface in /sys/class/backlight/radeon_bl0 does not work.
Echoing to "brightness" does not change the brightness of the Monitor. There is
also an apple_gmux interface, which works though.
I've bound xbacklight to the brightness keys to control the brightness, but it
looks like it's confused about which interface it should use:
$ xbacklight -inc 5
No outputs have backlight property
When I disable the Radeon card on boot and use the Intel card, xbacklight
works.
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