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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - System (seems to) completely freezes when interacting with java swing applications."
href="https://bugs.freedesktop.org/show_bug.cgi?id=99236">99236</a>
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<th>Summary</th>
<td>System (seems to) completely freezes when interacting with java swing applications.
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>tmp6154@yandex.ru
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</tr></table>
<p>
<div>
<pre>I'm not completely certain whether it's related to AMD GPU driver or not, but
it's rather strange issue that I can get stable reproduce for.
I'm running a Gentoo system with AMD Radeon RX 480, with git AMD GPU driver and
git version of mesa. When interacting with scrollable JTextAreas in Java Swing
application, I get a stably reproducible issue (100%). Since this affects
multiple java swing applications (e.g. eclipse), including the program I'm
developing at the time, I can attempt to put together a reproducer java app, if
that's needed.
For first 2-3 seconds, mouse cursor moves jittery, then it stops to move at all
and display keeps displaying same frozen state. Nothing appears to work,
including Ctrl+Alt+F1, etc. But despite machine looking completely locked up,
in fact, it's not. I can ssh into it and issue reboot command. During that
time, display doesn't shows any signs of life until the moment when machine
reboots (but I can hear KDE shutdown sound).
This occurs only under JRE8, both icedtea and oracle variants. Under JRE7 issue
doesn't trigger. If memory serves, JRE8 brought improvements to
hardware-accelerated GUI rendering. This is especially strange, since Swing GUI
framework renders it's own GUI widgets.
Considering that even Ctrl+Alt+F1 doesn't work, I suppose problem happens on
kernel level, possibly in AMD GPU driver.</pre>
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