[Bug 67454] After suspend/resume, screen is black for all but the highest levels with i915 driver on MacBook Air 6,2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67454

--- Comment #110 from Jani Nikula <jani.nikula at intel.com> ---
I'm not making any claims about us fixing the bug, but these commits might
help:

commit 32b421e79e6b546da1d469f1229403ac9142d695
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Mon Sep 19 13:35:25 2016 +0300

    drm/i915/backlight: setup and cache pwm alternate increment value

and

commit e29aff05f239f8dd24e9ee7816fd96726e20105a
Author: Shawn Lee <shawn.c.lee at intel.com>
Date:   Mon Sep 19 13:35:26 2016 +0300

    drm/i915/backlight: setup backlight pwm alternate increment on backlight
enable

in drm-intel-next-queued.

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