[Nouveau] [Bug 98677] [NVAC] iMac9, 1 effective backlight brightness range changes after S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98677

--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
An observation is that the nouveau code in nva3_get/set_intensity takes the
existing divider into account. However we only use that for nva3/5/8/f, not
nvaa/nvac.

Could you try changing nouveau_backlight.c:nv50_backlight_init to use
nva3_bl_ops for your chipset and seeing whether that fixes everything?

(Let me know if you're not sure how to do that, and I can put a patch
together.)

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