Re: [REGRESSION] Re: i915 driver crashes on T540p if docking station attached

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On Tuesday, August 04, 2015 12:05:14 AM Daniel Vetter wrote:
> On Mon, Aug 3, 2015 at 7:24 PM, Linus Torvalds
> <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> >>                      However, I'm
> >> still seeing a large number of drm/i915 related warning messages and
> >> other kernel kvetching.
> >
> > I suspect I can live with that for now. The lockdep one looks like
> > it's mainly an initialization issue, so you'd never get the actual
> > deadlock in practice, but it's obviously annoying.  The intel_pm.c one
> > I'll have to defer to the i915 people for..
> 
> The lockdep splat is just acpi being inconsistent with init_mutex vs.
> backlight notifier_chain (which has it's own lock) calls. init_mutex
> is new in 4.2 and has been added in
> 
> commit 87521e16a7abbf3fa337f56cb4d1e18247f15e8a
> Author: Hans de Goede <hdegoede@xxxxxxxxxx>
> Date:   Tue Jun 16 16:27:48 2015 +0200
> 
>     acpi-video-detect: Rewrite backlight interface selection logic
> 
> 
> Not mine ;-) But adding relevant people.

Hans, can you have a look at this, please?

Rafael

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