[Intel-gfx] [PATCH 10/10] drm/i915: kill gen4 gpu reset code

Eric Anholt eric at anholt.net
Sat Apr 28 01:26:10 CEST 2012

On Fri, 27 Apr 2012 21:17:02 +0200, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Fri, Apr 27, 2012 at 11:49:16AM -0700, Eric Anholt wrote:
> > On Fri, 27 Apr 2012 15:17:47 +0200, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> > > It's busted. Compared to ilk, snb and ivb where I've run the i-g-t
> > > hangman test in a loop for a few hours, my gm45 never managed to reset
> > > the gpu. And Chris Wilson confirmed on irc that he's never seen a case
> > > where the gen4 gpu reset code actually helped.
> > 
> > I remember originally when the hangcheck stuff landed, on a 965gm
> > running compiz, dragging a window with a bad shader around and seeing a
> > stutter as it reset the hardware successfully before crashing soon after
> > (then turning off the hanging plugin and continuing to use the system).
> I'm confused - so hangcheck once indeed managed to reset a i965gm gpu or
> never?

As far as I can remember, at one point it was reliably resetting.
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