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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - On kernel 4.1.0 with HD Graphics 5500, GPU hangs at boot time before Xorg started"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91152#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - On kernel 4.1.0 with HD Graphics 5500, GPU hangs at boot time before Xorg started"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91152">bug 91152</a>
from <span class="vcard"><a class="email" href="mailto:sami.liedes@iki.fi" title="Sami Liedes <sami.liedes@iki.fi>"> <span class="fn">Sami Liedes</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=116828" name="attach_116828" title="/sys/class/drm/card0/error with i915.enable_execlists=0; bzip2 compressed">attachment 116828</a> <a href="attachment.cgi?id=116828&action=edit" title="/sys/class/drm/card0/error with i915.enable_execlists=0; bzip2 compressed">[details]</a></span>
/sys/class/drm/card0/error with i915.enable_execlists=0; bzip2 compressed
With i915.enable_execlists=0, I get a single "[drm] stuck on render ring"/GPU
hang at boot. With intel_iommu=igfx_off, I see no GPU hangs and Xorg starts.
enable_execlists=0 case:
[ 7.723370] [drm] stuck on render ring
[ 7.724052] [drm] GPU HANG: ecode 8:0:0x00dfffff, reason: Ring hung, action:
reset
[ 7.724081] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 7.724113] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 7.724145] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 7.724177] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[ 7.724209] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7.725348] drm/i915: Resetting chip after gpu hang
Contents of /sys/class/drm/card0/error with enable_execlists=0 attached.</pre>
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