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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Delay in skl_disable_plane() causes a system freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104975#c39">Comment # 39</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Delay in skl_disable_plane() causes a system freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104975">bug 104975</a>
from <span class="vcard"><a class="email" href="mailto:bugs@mblankhorst.nl" title="Maarten Lankhorst <bugs@mblankhorst.nl>"> <span class="fn">Maarten Lankhorst</span></a>
</span></b>
<pre>The calls to kprintf will add a random delay, and will destroy the timing of
the vblank evasion, so it's not surprising it causes a hang. We had to remove
debug calls before because of that reason.
If the bug cannot be reproduced with the patch series any more, and you don't
get warnings with CONFIG_DRM_I915_DEBUG_VBLANK_EVADE enabled, then I think it's
fixed. :)</pre>
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