[Bug 108225] [LPT SPT KBP] Acer V3-772G screen brightness cannot be adjusted with i915.fastboot enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108225

--- Comment #49 from Tolga Cakir <cevelnet at gmail.com> ---
I have now tested the conditions mentioned in comment #48. With your patches
applied and setting backlight to 0 before S4, backlight gets restored to
max_brightness (4882 in my case) upon S4 resume.

When setting backlight to 0 before either S3 or S5, backlight gets set to 244
(out of 4882 max, so I guess 5%) after S3 / S5 resume. In all cases (S3, S4,
S5), I had working backlight controls and flicker free boot. Nice!

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