[Mesa-dev] [PATCH] i965: Fix Vertex URB Read Length calculation in 3DSTATE_SF on Gen6.

[Martin Steigerwald]

Am Mittwoch, 6. Februar 2013 schrieb Daniel Vetter:
> On Tue, Feb 05, 2013 at 10:40:28PM +0100, Martin Steigerwald wrote:
> > Am Dienstag, 5. Februar 2013 schrieb Daniel Vetter:
> > > On Sat, Feb 02, 2013 at 09:22:55PM +0100, Martin Steigerwald wrote:
> > > > About these messages: Uhm, bingo:
> > > > 
> > > > merkaba:~> zgrep -i "GPU hung" /var/log/kern.log*
> > > > /var/log/kern.log:Jan 29 22:29:55 merkaba kernel: [135984.784399]
> > > > [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
> > > > hung /var/log/kern.log:Jan 29 22:39:57 merkaba kernel:
> > > > [136585.410291] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer
> > > > elapsed... GPU hung
> > 
> > […]
> > 
> > > > /var/log/kern.log.1:Jan 27 00:51:19 merkaba kernel: [28709.417383]
> > > > [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
> > > > hung
> > > > 
> > > > 
> > > > Nothing in older logs it seems:
> > > > 
> > > > merkaba:~> ls -l /var/log/kern.log*
> > > > -rw-r----- 1 root adm  478589 Feb  2 20:55 /var/log/kern.log
> > > > -rw-r----- 1 root adm 1318618 Jan 27 12:14 /var/log/kern.log.1
> > > > -rw-r----- 1 root adm   52179 Jan 20 10:49 /var/log/kern.log.2.gz
> > > > -rw-r----- 1 root adm   63021 Jan 13 11:18 /var/log/kern.log.3.gz
> > > > -rw-r----- 1 root adm   51878 Jan  6 11:12 /var/log/kern.log.4.gz
> > > > 
> > > > 
> > > > So all I know is that it didn´t happen with Mesa 8.0.5. I think
> > > > 20th of January is about the time I started to test with Mesa
> > > > 9.0.2 and then 9.2-devel + first your initial BLORB
> > > > CopySubTexImage patch and then now all four of these and your Fix
> > > > Vertex URB one from this thread.
> > > 
> > > Retesting with latest 3.8-rc kernels might be good - we've just
> > > merged a few workaround patches for snb, which reportedly fix some
> > > hangs. -Daniel
> > 
> > I have 3.8-rc6 running. Since then I mostly see radeon drm fixes.
> > 
> > Any specific fix you have in mind for me to look out for?
> 
> Nope, you have the ones I've thought off, nothing else comes to mind for
> kernel stuff. I guess bisecting mesa would be a good next approach.

Daniel, I hid away on the prospect of bisecting. :)

But fortunately it does not seem to be necessary anymore. After

1) Downgrading the Debian mesa packages from my self compiled 9.0.1 ones to 
the official 8.0.5 ones, in order to make KWin happily use OpenGL effects again 
instead of falling back to XRender and

2) Compiling mesa git master from 1fe007399c1ed28b8cef9d4f040164480423f2c9

the hangs seem to be gone.

Maybe the V4 patch of Kenneth regarding the BLORB thing removed a hang?

Whatever: PS is playable beautifuly in Full HD on this ThinkPad T520 with 
Intel Sandybridge HD 3000 graphics.

Many thanks for making this possible, especially to you, Kenneth.

Ciao,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7