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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GM45] asynchronous wait on fence i915:[global]:3268e timed out; critical performance loss minutes prior"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104496">104496</a>
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<th>Summary</th>
<td>[GM45] asynchronous wait on fence i915:[global]:3268e timed out; critical performance loss minutes prior
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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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
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>promarbler14@gmail.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=136555" name="attach_136555" title="drm.debug=0x1f kernel log during critical performance loss">attachment 136555</a> <a href="attachment.cgi?id=136555&action=edit" title="drm.debug=0x1f kernel log during critical performance loss">[details]</a></span>
drm.debug=0x1f kernel log during critical performance loss
Arch Linux x86_64
linux-drm-tip-git 4.15rc6+1282+g5f40895798ad+724923-1
xorg-server 1.19.6-2
mesa 17.3.1-2
libdrm 2.4.89-1
xf86-video-intel 1:2.99.917+804+g708255cb-2 (w/o debug)
Get the following warning in the kernel log: asynchronous wait on fence
i915:[global]:3268e timed out
The actual issue is the alt-tabbing away from a fullscreen Minecraft window
while it is actively rendering will cause critical performance issues. It'll
minimize... but slowly and without redrawing everything. Sometimes the
performance effect is delayed. After that, the desktop and any VT-switching is
horrendously slow (on the order of several seconds to nearly a minute), forcing
me to kill the minecraft program. Even after killing it, it takes a few seconds
for the graphics to respond again. After switching to a linux console,
performance is fine, having no extreme CPU or RAM usage.
The attachment has a drm.debug=0x1f kernel log. While it didn't seem to capture
the warning in this attempt, the critical performance loss is still there. It
starts at around 14:02 and lasts for about 8 minutes.</pre>
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