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<body><span class="vcard"><a class="email" href="mailto:bjorn.de.meyer@gmail.com" title="BDM <bjorn.de.meyer@gmail.com>"> <span class="fn">BDM</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Starting teeworlds results in black screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=43248">bug 43248</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Severity</td>
<td>minor
</td>
<td>normal
</td>
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<td style="text-align:right;">Priority</td>
<td>medium
</td>
<td>high
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Starting teeworlds results in black screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=43248#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Starting teeworlds results in black screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=43248">bug 43248</a>
from <span class="vcard"><a class="email" href="mailto:bjorn.de.meyer@gmail.com" title="BDM <bjorn.de.meyer@gmail.com>"> <span class="fn">BDM</span></a>
</span></b>
<pre>I'm having the same problem with the same dmesg output with the same chipset
HD6520 for any game that sets true full screen graphics mode on Ubuntu 12.10.
If I use a game, like Titanion, that can be closed by simple keystrokes, I can
manage to escape the black screen and get back to my normal desktop.
Also perhaps unrelated, setting to a lower resolution desktop mode 800x600, or
lower seems to set an incorrect mode that garbles the screen. That too I can
escape if I have an xrandr ready to enable me to do so.
Here's uname -a
Linux falcon 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64
x86_64 x86_64 GNU/Linux
Relevant part of dmesg
[ 681.224351] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than
5secs aborting
[ 681.224364] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing
E2F6 (len 2585, WS 4, PS 4) @ 0xE9E0
[ 681.259083] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery reached max
voltage
[ 681.259095] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed
I think the driver is partially broken for this chipset.</pre>
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