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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 --- - One screen black in Zaphod configuration (regression)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77156">77156</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>One screen black in Zaphod configuration (regression)
</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>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nbowler@draconx.ca
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=97050" name="attach_97050" title="Xorg log">attachment 97050</a> <a href="attachment.cgi?id=97050&action=edit" title="Xorg log">[details]</a></span>
Xorg log
After updating xf86-video-intel to latest my primary display in a zaphod
configuration shows black. FWIW, the problematic display is connected via
HDMI; but the VGA display is still working. The display is "gone" in that I
cannot move the mouse cursor off of the VGA display, although if I run xrandr
it is still there in spirit, but apparently configured to an 8x8 mode.
% echo $DISPLAY
:2.1
% xrandr -display :2.0
Screen 0: minimum 8 x 8, current 8 x 8, maximum 32767 x 32767
HDMI1 connected (normal left inverted right x axis y axis)
1920x1080 59.9 + 60.0 60.0 50.0 59.9
1920x1080i 60.1 50.0 60.0
1680x1050 59.9
1280x1024 75.0 60.0
1152x864 75.0
1280x720 60.0 50.0 59.9
1024x768 75.1 60.0
832x624 74.6
800x600 75.0 60.3 56.2
720x576 50.0
720x480 60.0 59.9
640x480 75.0 60.0 59.9
720x400 70.1
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Bisection pinpoints the following as the problematic commit, and reverting
this commit corrects the issue.
35b03b3fe6213eb3e08f05efe3428bd6bc5421d2 is the first bad commit
commit 35b03b3fe6213eb3e08f05efe3428bd6bc5421d2
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Fri Mar 28 09:14:59 2014 +0000
sna: Virtual CRTCs are last, so break loops early
We know that all the virtual CRTCs are at the end of the CRTC array, so
when we see the first one, we can stop the processing of real CRTCs.
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
:040000 040000 b9e518145aae38b28e7bdd18c72f5d123901424f
2380f4e62562601f678258f4363402b3da9be615 M src
server 1.15.0
libdrm 2.4.52
linux 3.12.5</pre>
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