Re: 3.15-rc2: i915 regression: only top 20% of screen works in X

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On Wed 2014-04-23 23:09:45, Daniel Vetter wrote:
> On Wed, Apr 23, 2014 at 10:22 PM, Pavel Machek <pavel@xxxxxx> wrote:
> > After update to 3.15-rc2, only top 20% of screen works on X.
> >
> > 00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset
> > Integrated Graphics Controller (rev 03)
> >
> > 00:02.1 Display controller: Intel Corporation 4 Series Chipset
> > Integrated Graphics Controller (rev 03)
> >            Subsystem: Intel Corporation Device d614
> >            Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> >            ParErr- Stepping- SERR- FastB2B- DisINTx-
> >            Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast
> >            >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> >            Latency: 0
> >            Region 0: Memory at d0400000 (64-bit, non-prefetchable)
> >            [size=1M]
> >            Capabilities: <access denied>
> >
> > This worked before. I believe it worked in 3.14. It definitely works
> > in 3.11-rc2.
> 
> Screenshot or more detailed description of what "only top 20% of
> screen works in X" means?

Well, top cca 20% is ok, then I got repeated pattern of some part of screen.

> Anything in dmesg?

That will take a look.

> bisect result presuming that it reproduces reliably?

If there's no other chance, I guess I could do bisect. But
first.... Do you have similar hardware? Does it work for you? Are
there any experimental changes that went in recently and I should
try reverting first?

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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