[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 #46 from Takashi Iwai <tiwai at suse.de>  2013-03-15 11:20:07 ---
Yeah, my patch is really broken.  I can confirm that a new HP test machine is
broken on 3.9-rc2, and I had to revert the commit.

While comparing the reg dump with the one on Dell, I noticed the difference of
BLC_PWM_CPU_CTL.  Hopefully the patch below works for both Dell and HP.

It works on a HP machine here.  Alexander, please check whether it works for
you, too.

More importantly, Grant, could you check whether it doesn't break yours again?

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