On Mon, Mar 09, 2015 at 08:06:57AM -0400, dan mclaughlin wrote: > >Synopsis: system hangs after drm:i915_hangcheck_hung error > >Category: video driver > >Environment: > System : OpenBSD 5.7 > Details : OpenBSD 5.7 (GENERIC) #738: Sun Mar 8 10:59:31 MDT 2015 > > [email protected]:/usr/src/sys/arch/i386/compile/GENERIC > > Architecture: OpenBSD.i386 > Machine : i386 > >Description: > system hangs after moderate use. it mostly seems to occur when a > program starts (ie qiv feh mplayer). scrolling thru photos hasn't > triggered it yet, but quitting and restarting a viewer may. > it doesn't take much to trigger it, i can reproduce fairly quickly. > just now got around to reporting, but it's been happening for at > least a couple months now. usually the system freezes before anything > gets recorded, but by sheer luck i just got this: > > Mar 9 07:07:26 node02 /bsd: error: [drm:pid3557:i915_hangcheck_hung] *ERROR* > Hangcheck timer elapsed... GPU hung > Mar 9 07:07:28 node02 /bsd: error: [drm:pid3557:i915_hangcheck_hung] *ERROR* > Hangcheck timer elapsed... GPU hung > Mar 9 07:07:28 node02 /bsd: error: [drm:pid21570:i915_reset] *ERROR* GPU > hanging too fast, declaring wedged! > Mar 9 07:07:28 node02 /bsd: error: [drm:pid21570:i915_reset] *ERROR* Failed > to reset chip. > > i am pretty certain this is the same issue as reported here: > > https://bugs.freedesktop.org/show_bug.cgi?id=54226
That looks unrelated and only for gen6 hardware. At least part of the problem here is that the gen2 reset itself is known to cause problems and was at one point removed. Here is an equivalent of commit e252d07aff961f8553822cda621490d9aeef8a06 Author: Daniel Vetter <[email protected]> Date: Tue Oct 8 12:25:41 2013 +0200 drm/i915: rip out gen2 reset code At least on my i830M here it reliably results in hard system hangs nowadays. This is much worse than falling back to software rendering, so I think we should simply rip this out. After all we don't have any gpu reset for gen3 either, and there are a lot more of those still around. Cc: Chris Wilson <[email protected]> Acked-by: Chris Wilson <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Index: sys/dev/pci/drm/i915/i915_drv.c =================================================================== RCS file: /cvs/src/sys/dev/pci/drm/i915/i915_drv.c,v retrieving revision 1.75 diff -u -p -r1.75 i915_drv.c --- sys/dev/pci/drm/i915/i915_drv.c 12 Feb 2015 04:56:03 -0000 1.75 +++ sys/dev/pci/drm/i915/i915_drv.c 9 Mar 2015 15:08:05 -0000 @@ -1364,36 +1364,6 @@ inteldrm_timeout(void *arg) task_add(dev_priv->mm.retire_taskq, &dev_priv->mm.retire_task); } -static int i8xx_do_reset(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (IS_I85X(dev)) - return -ENODEV; - - I915_WRITE(D_STATE, I915_READ(D_STATE) | DSTATE_GFX_RESET_I830); - POSTING_READ(D_STATE); - - if (IS_I830(dev) || IS_845G(dev)) { - I915_WRITE(DEBUG_RESET_I830, - DEBUG_RESET_DISPLAY | - DEBUG_RESET_RENDER | - DEBUG_RESET_FULL); - POSTING_READ(DEBUG_RESET_I830); - drm_msleep(1, "8res1"); - - I915_WRITE(DEBUG_RESET_I830, 0); - POSTING_READ(DEBUG_RESET_I830); - } - - drm_msleep(1, "8res2"); - - I915_WRITE(D_STATE, I915_READ(D_STATE) & ~DSTATE_GFX_RESET_I830); - POSTING_READ(D_STATE); - - return 0; -} - static int i965_reset_complete(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -1540,9 +1510,6 @@ int intel_gpu_reset(struct drm_device *d break; case 4: ret = i965_do_reset(dev); - break; - case 2: - ret = i8xx_do_reset(dev); break; }
