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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Celeron N3150 : random display off instants and occasional full-system freezes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96540">96540</a>
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<th>Summary</th>
<td>Celeron N3150 : random display off instants and occasional full-system freezes
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<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/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rjvbertin@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=124548" name="attach_124548" title="lspci -v">attachment 124548</a> <a href="attachment.cgi?id=124548&action=edit" title="lspci -v">[details]</a></span>
lspci -v
I've taken a new notebook into service, a Clevo W510LU with Intel Celeron N3150
(Cherryview/Braswell graphics), 8Gh RAM. Currently I'm running an updated
Kubuntu 14.04.4LTS with
- mainline kernel 4.5.6, home-built
- Ubuntu's LTS-Wily versions of the Xorg (1.17.2) and Mesa (11.0.2), including
the XOrg Intel drivers 2:2.99.917+git20150808-0ubuntu4~trusty2, and libxcb-dri3
1.10-2ubuntu1 .
I have several issues that seem to correspond to what others are reporting:
- at random times the display will turn off while I'm typing, as if I use the
Fn-F2 shortcut which is supposed to do exactly that. Just as with that feature,
a stroke on the touchpad turns the screen back on, nothing else.
- the screen turns off after a period of inactivity, not sure if and how that's
related to the screensaver. Audio-over-hdmi continues when that happens. XDPMS
is off.
- Once or twice the screen turned off and wouldn't come back on, except after
suspending and waking the machine
- From time to time the whole machine freezes. This has only happened until now
when doing a biggish compile job, but the last time it happened it shouldn't
have been related to overheating (fans were barely running).
The difference with what others report is that I get no feedback whatsoever in
my logs or dmesg. I do see an occasional
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun
but I cannot yet confirm if that's related to any of the events mentioned
above.
I'll be trying the UXA suggestion mentioned here:
<a href="https://bbs.archlinux.org/viewtopic.php?pid=1533863#p1533863">https://bbs.archlinux.org/viewtopic.php?pid=1533863#p1533863</a> but if there are
other things I could do other than wait for an updated i915 driver I'd love to
know.</pre>
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