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<body><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> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [IVB] intermittent return from blank shows non-rotated monitors glitch"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89904">bug 89904</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [IVB] intermittent return from blank shows non-rotated monitors glitch"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89904#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [IVB] intermittent return from blank shows non-rotated monitors glitch"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89904">bug 89904</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>Ok, I noticed that it wasn't taking account of the rotation flag when choosing
the initial contents for the scanout when waking up - so it was copying the
frontbuffer without rotation onto the RandR shadow scanout before binding it to
the CRTC. We did promptly try to redisplay the outputs (~16ms later but that is
mostly due to the verbosity of the logging and CRTC enabling), but
[ 2535.903] sna_mode_redisplay: shadow idle, skipping update
so that means the unrotated content would persist until redraw. I believe I
understand the problem correct (kudos for getting the right bit of the log!):
commit e74ff581449e92d7933da1b5df6680cb880fc454
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Mon Apr 6 13:58:35 2015 +0100
sna: Force the TearFree redisplay when populating a rotated configuration
We have to disable the "shadow idle; skipping" test if the CRTCs are
showing stale content following a sna_crtc_attach().
Reported-by: Chris Bainbridge <<a href="mailto:chris.bainbridge@gmail.com">chris.bainbridge@gmail.com</a>>
References: <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [IVB] intermittent return from blank shows non-rotated monitors glitch"
href="show_bug.cgi?id=89904">https://bugs.freedesktop.org/show_bug.cgi?id=89904</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>></pre>
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