[Bug 105051] Radeon sets max_brightness to -1, breaking GNOME backlight control on Macbook Pro mid-2015 11,5

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=105051

Alex Deucher <alexdeucher at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |alexdeucher at gmail.com

--- Comment #1 from Alex Deucher <alexdeucher at gmail.com> ---
Radeon hardware supports 256 levels of brightness (0-255).  The backlight
integer property max_brightness is thus set to RADEON_MAX_BL_LEVEL (0xff).  It
sounds like GNOME is misinterpreting the value.

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