[Intel-gfx] [PATCH 1/1] drm: i915: don't use OpRegion for XPS 13 IvyBridge

[Jani Nikula]

On Mon, 29 Aug 2016, Andrea Arcangeli <aarcange at redhat.com> wrote:
> On Mon, Aug 29, 2016 at 10:24:38AM +0300, Jani Nikula wrote:
>> If it's an Iybridge, there's no low vswing, and that explanation is
>> false. You can verify by trying i915.edp_vswing=1 or i915.edp_vswing=2
>> on an unpatched kernel.
>
> CC'ed Martin who filed the bz, he can reproduce too
> https://bugzilla.kernel.org/show_bug.cgi?id=151731
>
> Since you can reproduce would you have the time to test the two above
> options on stock 4.7.x/4.8-rc and help tracking this down? I'm afraid
> I won't be able to test it today and I'll be mostly offline for a week
> starting tomorrow.

As I tried to explain, the low voltage swing is not related to backlight
issues.

BR,
Jani.

>
> Thanks,
> Andrea

-- 
Jani Nikula, Intel Open Source Technology Center