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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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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 --- - X freezes on scrolling"
href="https://bugs.freedesktop.org/show_bug.cgi?id=63666">63666</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>X freezes on scrolling
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>petrel.hart@gmail.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
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<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=78163" name="attach_78163" title="backtrace from gdb and accompanying Xorg bt.">attachment 78163</a> <a href="attachment.cgi?id=78163&action=edit" title="backtrace from gdb and accompanying Xorg bt.">[details]</a></span>
backtrace from gdb and accompanying Xorg bt.
Hardware: lenovo E530c ("Intel Corporation 2nd Generation Core Processor Family
Integrated Graphics Controller")
driver: i915
OS: debian 3.2.0-4-amd64
xserver-xorg-video-intel: 2:2.20.14-1
Symptom:
1) Open libreoffice writer; new document.
2) Make a few new pages (ctl-enter).
3) Scroll up and down rapidly with the touchpad a few times.
4) X freezes, with two outcomes: (a) either a hung GPU and all windows black
(but, mouse still moves); or else (b) totally frozen X with "[mi] EQ overflow
continuing." and backtrace in Xorg.0.log.
This doesn't occur on a similar lenovo machine (T420i). It doesn't seem to
happen in other applications; libreoffice folks determined it to be not their
problem ( <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTOURBUG - scrolling with mouse crashes X"
href="show_bug.cgi?id=62946">https://bugs.freedesktop.org/show_bug.cgi?id=62946</a> ) and suggested
the intel drivers.
Logs for case (a) are at
<a href="http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;att=0;bug=703749">http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;att=0;bug=703749</a> and for
case (b) are at
<a href="http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=15;att=0;bug=703749">http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=15;att=0;bug=703749</a> .
I've also attached a debugger to Xorg, as described here (
<a href="http://wiki.x.org/wiki/Development/Documentation/ServerDebugging">http://wiki.x.org/wiki/Development/Documentation/ServerDebugging</a> , although it
need ctrl-c to get it to backtrace) -- I'm attaching the backtrace from case
(b).</pre>
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