[Bug 44156] [GM45] failure to control backlight

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=44156

--- Comment #46 from Daniel Vetter <daniel at ffwll.ch> ---
The setpci thing is the legacy hack (which on some Acer laptops seems to get
horribly in the way). Backlight /should/ get controlled through
/sys/class/backlight drivers. At least that's what X will use ...

Do none of those drivers work? If that's the case, you need a platform specific
(probably some acpi/wmi magic) backlight driver ...

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