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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK] With Linux 4.2 Xorg can't start, then kernel module crash, then system completely freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91906#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK] With Linux 4.2 Xorg can't start, then kernel module crash, then system completely freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91906">bug 91906</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>The trigger is the TIMESTAMP probe inside mesa, using the reg_read_ioctl. That
for some reason is causing a soft lockup inside the reader, so I presume it is
the retry if unstable logic? If you revert:
commit ee0a227b7ac6e75f28e10269f81c7ec6eb600952
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Jul 15 09:50:42 2015 +0100
drm/i915: Replace WARN inside I915_READ64_2x32 with retry loop
does the system recover?</pre>
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