3.13 i915 brightness settings broken when going from docked -> undocked

[Jani Nikula]

On Thu, 20 Feb 2014, Paul Bolle <pebolle at tiscali.nl> wrote:
> On an (rather old) ThinkPad X41, which also uses i915, brightness
> adjustments stopped working altogether in v3.14-rc1 (I haven't used its
> docking station in the v3.14 release cycle). In v3.13.y things behave as
> expected. So perhaps there's actually a more general problem here.

I presume different problems. Does the ThinkPad X41 have gen3 graphics?
(See e.g. /sys/kernel/debug/dri/0/i915_capabilities) If yes, it might be
https://bugs.freedesktop.org/show_bug.cgi?id=75001

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center