[Bug 27859] Please support the BACKLIGHT property in radeon

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27859

--- Comment #4 from Julien Cristau <jcristau at debian.org> 2010-04-27 14:59:32 PDT ---
> --- Comment #3 from Alex Deucher <agd5f at yahoo.com> 2010-04-27 13:46:12 PDT ---
> I shouldn't say acpi as not all platforms support it.  What I mean is the
> kernel backlight interface which on most x86 systems goes through acpi.  If gpm
> uses that, it will work with all systems that support it rather than doing
> one-offs for every system or requiring all drivers to implement an xrandr
> property.
> 
gpm can't really use that directly, it doesn't run as root (and may not
even be on the same machine as the display).  it makes more sense to
have the driver use the sysfs interface and provide access to it through
randr imo (intel does that, in any case)...

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