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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - No display after coming back from suspend"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101849">101849</a>
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<th>Summary</th>
<td>No display after coming back from suspend
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>7.7 (2012.06)
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Driver/intel
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
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<th>Reporter</th>
<td>post+fdo@ralfj.de
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<p>
<div>
<pre>Every now and then, when I wake up my laptop from suspend, the display stays
black. This seems happen when I start out working on an external screen (so
the laptop screen is disabled), then suspend the machine and unplug the
external screen (pretty much at the same time, I can't which happened first).
Using Ctrl-Alt-F<N> to switch to other terminals still works, but Ctrl-Alt-F7
always brings up just a black screen.
I tried debugging this further, but did not get very far. The logs (dmesg,
journalctl, Xorg log) don't seem to contain anything useful, except for lots of
kscreen output (attached). I tried to interact with the still-running X
session by setting DISPLAY and XAUTHORITY in another terminal. "xrandr -q"
showed my laptop screen, including all its resolutions, as being turned off. I
tried to turn it on ("xrandr --auto"), which failed saying
xrandr: Configure crtc 0 failed
Again, I was unable to get any further details about this error from any logs.
Needless to say, this is an extremely disruptive bug; I lose my entire session
state of all running applications.
I have no idea which product and component to assign this to, so I figured I'd
start with the X server.</pre>
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