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.triller@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.