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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Buffer not flushed when drawing R plots"
href="https://bugs.freedesktop.org/show_bug.cgi?id=59085">59085</a>
</td>
</tr>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
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<th>Summary</th>
<td>Buffer not flushed when drawing R plots
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>cairo-bugs@cairographics.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>nalimilan@club.fr
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>1.12.8
</td>
</tr>
<tr>
<th>Component</th>
<td>xlib backend
</td>
</tr>
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<th>Product</th>
<td>cairo
</td>
</tr></table>
<p>
<div>
<pre>This bug appeared somewhere between Cairo 1.10.2 and 1.12.4, as I could check
by downgrading my packages. It has been experienced on Fedora [1] and Arch [2],
at least.
Using the R statistical framework, plots are not drawn until one resizes the
plot window. Disabling buffered rendering using X11.options(type="nbcairo")
fixes the problem. If you are interested in reproducing the bug, calling
plot(1:10) is enough.
The problem has been reported by people with Intel GPUs (i915 driver) and with
ATI GPUs (Catalyst driver). So it seems to be a Cairo bug, or at least a change
in Cairo unveiled a bug in these drivers.
If you have any suspicion of the commit that may have introduced this, I can
test that version.
1: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=891983">https://bugzilla.redhat.com/show_bug.cgi?id=891983</a>
2: <a href="https://bugs.archlinux.org/task/32597">https://bugs.archlinux.org/task/32597</a></pre>
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