[Bug 47941] [snb] Backlight control broken between 3.6.0-rc1 and 3.6.0-rc4

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=47941





--- Comment #45 from Alexander Mezin <mezin.alexander at gmail.com>  2013-03-15 08:55:00 ---
Sorry, it may be not clear: intel_panel_get_backlight(dev) returns 4882 but
screen is turned off. But calling "intel_panel_actually_set_backlight"
unconditionally fixes the problem.

Also, I don't understand, how backlight control even works on machines where
"setting the backlight level _after_ enabling it seems
to reset it somehow". Maybe the problem with these machines isn't there?

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