[Bug 101111] [Regression BDW] backlight flickering/display artifacting on Broadwell integrated graphics with 4.12-rc1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101111

--- Comment #35 from Mark Spencer <n7u4722r35 at ynzlx.anonbox.net> ---
Created attachment 133578
  --> https://bugs.freedesktop.org/attachment.cgi?id=133578&action=edit
intel_reg_dump #31 patch

Sorry for the delay but I wanted to test this for some time. It seems
flickering is gone with https://bugs.freedesktop.org/show_bug.cgi?id=101111#c31
patch alone.

Here's excerpt from logs:

[drm:intel_opregion_setup [i915]] Found valid VBT in ACPI OpRegion (Mailbox #4)
[drm:intel_opregion_get_panel_type [i915]] Ignoring OpRegion panel type (0)

I attached new intel_reg dump just in case.

I think that we can assume that this patch solves the issue. Thank you for all
your help!

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