[Bug 53153] [gm45] Backlight shuts off during boot when KMS is enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=53153

--- Comment #33 from Jay Abbott <jpabbott02 at gmail.com> ---
Okay, so I just tried adjusting the backlight by changing the value in
'/sys/class/backlight/acpi_backlight0/backlight', and it had no effect. 

Seems that the ACPI control for the backlight is the culprit, this would
explain why the FN keys fail to frob the brightness. 

intel_backlight being a fallback, I imagine that during boot, the system tries
to set the brightness using the ACPI control and fails? I'll take a look at
dmesg and see what I can get out of it...

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