[Bug 53491] 'xset dpms force off' breaks backlight

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=53491

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
                 CC|                            |chris at chris-wilson.co.uk
         Resolution|---                         |CODE_FIX

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit e85843bec6c2ea7c10ec61238396891cc2b753a9
Author: Kamal Mostafa <kamal at canonical.com>
Date:   Fri Jul 19 15:02:01 2013 -0700

    drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight

    BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=47941
    BugLink: https://bugs.launchpad.net/bugs/1163720
    BugLink: https://bugs.launchpad.net/bugs/1162026

    Some machines suffer from non-functional backlight controls if
    BLM_PCH_PWM_ENABLE is set, so provide a quirk to avoid doing so.
    Apply this quirk to Dell XPS 13 models.

    Tested-by: Eric Griffith <EGriffith92 at gmail.com>
    Tested-by: Kent Baxley <kent.baxley at canonical.com>
    Cc: <stable at vger.kernel.org> # v3.8+
    Signed-off-by: Kamal Mostafa <kamal at canonical.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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