[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 #83 from Jani Nikula <jani.nikula at intel.com>  2013-05-15 10:52:08 ---
(In reply to comment #82)
> As a fresh owner of a XPS 13 (fhd version) I stumbled accross the backlight
> problems and found this bug. I'm sorry to say that patch in attachment 1011331
> applied to a vanilla 3.9.2 (succeeds with some offsets) does not fix the
> problem for me.
> 
> The only working solution for me is "echo 0 >
> /sys/class/backlight/intel_backlight/brightness" after boot or resume from
> suspend.
> 
> Some research learns that I seem to own the Ivy Bridge version (i7-3537U) so
> it's to be expected this patch shouldn't work, but contradicts the statement
> "which didn't need it after all".

How about with the old version of the patch that should cover IVB too?
https://bugzilla.kernel.org/attachment.cgi?id=97751

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