[Bug 106006] Kernel 4.16.0+ switch amdgpu.dc=1 causes screen brightness set to 1 to be dimmed by default

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106006

--- Comment #13 from Harry Wentland <harry.wentland at amd.com> ---
Not sure exactly how that kernel is assembled but it contains the problematic
code in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c. You should be
able to simply delete the block for if (__is_lut_linear(...)) in
amdgpu_dm_set_regamma_lut to fix this, if the patch doesn't straight-up apply.

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