Re: 3.15-rc5: Regression in i915 driver?

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On Mon, May 12, 2014 at 10:09:54AM +0300, Jani Nikula wrote:
> On Sun, 11 May 2014, Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
> > On Sun, May 11, 2014 at 11:02 AM, Dave Airlie <airlied@xxxxxxxxx> wrote:
> >> On 11 May 2014 18:28, Thomas Meyer <thomas@xxxxxxxx> wrote:
> >>> Hi,
> >>>
> >>> 3.14.3 works as expected.
> >>> 3.15-rc5 shows a strange behaviour: When resuming from ram the X server
> >>> seems to be disfunctional.
> >>>
> >>> I see this WARNING in the kernel log before suspend to ram in the early
> >>> boot process:
> >
> > Doesn't ring a bell really.
> > - Is there anything in dmesg after resume?
> > - How exactly does X misbehave? Is fbcon still working? Does X
> > behaviour get restored if you restart X?
> > - Can you please try to bisect this issue? Note that the backlight
> > issue might be unrelated to the issues with X misbehaving after
> > resume. You might need to do a bisect for both if the symptoms don't
> > agree.
> 
> I agree the WARNING from i965_enable_backlight() is unrelated. Focus on
> the other symptoms first.

The backlight backtrace seems to be a genuine new bug. Bisecting it would
be highly appreciated. Bisecting on the other issue and appending the
result to the bug Chris quoated should also really be useful - atm we
don't have any reported who can reproduce this clearly enough to do a
bisect.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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