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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Apr 15 10:59:54 PDT 2011


--- Comment #5 from Alex Deucher <agd5f at yahoo.com> 2011-04-15 10:59:55 PDT ---
The thing is radeon backlight control is oem specific.  Some use the on-GPU
controller, others use a platform specific solution, so acpi is the best option
since it covers all the bases.  Things like hybrid laptops get even more
complicated (multiple GPUs sharing the same display hw). The kernel backlight
interface seems like the right interface since it doesn't depend on X or randr
1.2 support so it covers just about everything (SoCs, non-randr 1.2 hw, systems
without X, etc.).

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