[Bug 77263] [BDW GT3]System hangs while running glxgear with SNA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77263

--- Comment #24 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #19)
> (In reply to comment #18)
> > (In reply to comment #16)
> > > (In reply to comment #13)
> > > > One thing to try is
> > > > 
> > > > commit b12bc035fb8ee40bb382e66604e869b729270189
> > > > Author: Chris Wilson <chris at chris-wilson.co.uk>
> > > > Date:   Tue Apr 22 12:30:29 2014 +0100
> > > > 
> > > >     sna: Add a DBG aide to disable hardware execution
> > > >     
> > > >     Submit a dummy batch so that we still build, submit batches and perform
> > > >     relocations, but do not actually invoke the GPU. This can be useful when
> > > >     looking at mysterious hardware hangs.
> > > >     
> > > >     References: https://bugs.freedesktop.org/show_bug.cgi?id=77263
> > > >     Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > > > 
> > > > and
> > > > 
> > > > diff --git a/src/sna/kgem.c b/src/sna/kgem.c
> > > > index 82199a1..68b0917 100644
> > > > --- a/src/sna/kgem.c
> > > > +++ b/src/sna/kgem.c
> > > > @@ -61,7 +61,7 @@ static struct kgem_bo *
> > > >  search_snoop_cache(struct kgem *kgem, unsigned int num_pages, unsigned
> > > > flags);
> > > >  
> > > >  #define DBG_NO_HW 0
> > > > -#define DBG_NO_EXEC 0
> > > > +#define DBG_NO_EXEC 1
> > > >  #define DBG_NO_TILING 0
> > > >  #define DBG_NO_CACHE 0
> > > >  #define DBG_NO_CACHE_LEVEL 0
> > > > 
> > > > That will isolate the fault in either the driver or the hardware.
> > > 
> > > 
> > > Sorry, I did't find this commit in -nightly -fixes and -next-queued branch,
> > > could you tell me, which branch this commit in? Thanks.
> > 
> > xf86-video-intel.
> 
> Reset to commit b12bc035fb8ee40bb382e66604e869b729270189 and patched, then
> build it with latest unstable X11R7, the screen unable to display after
> start X.

As expected. Did you run glxgears?

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