[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 #101 from Kamal Mostafa <kamal at canonical.com> ---
> So do we need to revert the patch again?

In my opinion: We should definitely _not_ revert the patch (e85843b "drm/i915:
quirk no PCH_PWM_ENABLE for Dell XPS13 backlight").

If I understand Evan Callicoat correctly, he's reporting that it breaks
backlight control only for a single non-default configuration (UEFI without
Legacy).  But it fixes backlight control for all other configurations, most
importantly the default Legacy BIOS configuration which is what the majority of
XPS13 users are actually using.

Evan's report warrants further investigation and maybe an additional patch, but
lets not break the many many XPS13 users who've just gotten working backlight
controls, please!

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.