[Bug 203439] amdgpu: [REG 4.20 -> 5.0] Brightness minimum level is too high

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=203439

Nicholas Kazlauskas (nicholas.kazlauskas at amd.com) changed:

           What    |Removed                     |Added
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                 CC|                            |nicholas.kazlauskas at amd.com

--- Comment #2 from Nicholas Kazlauskas (nicholas.kazlauskas at amd.com) ---
At some point we started reading the ACPI backlight caps to respect the actual
backlight range for the panel. We map the backlight level specified by the user
from 0-255 to that range.

In the case where the caps aren't valid we use a default minimum brightness
that's non-zero since some panels will flash when the backlight level goes to
zero.

While I don't know offhand the reasoning for 12 specifically I also don't think
we'll be dropping it back down to zero.

Wouldn't DPMS off give you what you want in this case?

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