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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Corrupted display in graphical Emacs with HEAD intel and SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101620">101620</a>
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<th>Summary</th>
<td>Corrupted display in graphical Emacs with HEAD intel and SNA
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Driver/intel
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
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<th>Reporter</th>
<td>wingo@igalia.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<div>
<pre>Hello,
Since updating to intel xorg driver b57abe20e81f4b8e4dd203b6a9eda7ff441bc8ce
and still the case with git master, graphical-mode Emacs shows corruption when
using SNA (the default). I am on a thinkpad x1 carbon 3rd gen, but many other
people see this on other machines:
<a href="https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00263.html">https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00263.html</a>
I see corruption ranging from what appears to be tiles not updating but also
small issues like certain letters not rendering. I work around it, very sadly,
with M-x redraw-display, which always fixes the display. I guess there is some
incremental update path that graphical Emacs hits that I don't see usually. I
run in Gnome Shell FWIW so there is a compositor in the middle.
I don't know when this started, as I don't update very frequently. It only
happens in graphical Emacs; no other program. Although Emacs had updated when
I upgraded Xorg, I tried running the older, known-working copy as well and had
the same issues with run under the new Xorg driver. Setting the system to use
UXA instead of SNA fixes the issue.
We have many people that would be happy to test any proposed fixes :) Thanks
for all your work over the years and thanks in advance for having a look!
Andy</pre>
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