[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


Martin <bugs at mrvanes.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugs at mrvanes.com




--- Comment #82 from Martin <bugs at mrvanes.com>  2013-05-15 10:05:23 ---
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".

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