<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb] GTT mapping fails after GPU hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=63921#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb] GTT mapping fails after GPU hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=63921">bug 63921</a> from <a class="email" href="mailto:ben@bwidawsk.net" title="Ben Widawsky <ben@bwidawsk.net>"> Ben Widawsky</a> <pre>(In reply to <a href="show_bug.cgi?id=63921#c7">comment #7</a>) > More interesting fail: > > [ 4366.361686] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... > GPU hung > [ 4366.361694] [drm] capturing error event; look for more information > in/sys/kernel/debug/dri/0/i915_error_state > [ 4366.871407] [drm:i915_reset] *ERROR* Failed to reset chip. > [ 4376.364660] [drm:i915_gem_wait_for_error] *ERROR* Timed out waiting for > the gpu reset to complete > > > Pity we can't get the i915_error_state back, but if you can isolate the > cause of the hang that will be enough for the libva (or whoever to work on). Please try this specifically for the reset hang: diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 8539177..df9dfa5 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4036,6 +4036,10 @@ i915_gem_init_hw(struct drm_device *dev) I915_WRITE(GEN7_MSG_CTL, temp); } + DRM_ERROR("Forcing no wait on PCH (SNB ONLY)\n"); + I915_WRITE(ILK_DISPLAY_CHICKEN2, + I915_READ(ILK_DISPLAY_CHICKEN2) & ~(0x3 << 14)); + i915_gem_l3_remap(dev); i915_gem_init_swizzling(dev);</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>