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<base href="https://bugs.freedesktop.org/" />
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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 --- - triple display issue on IvyBridge platform ( i5-3470T + Q77 )."
href="https://bugs.freedesktop.org/show_bug.cgi?id=59810">59810</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>triple display issue on IvyBridge platform ( i5-3470T + Q77 ).
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>terence.chiang@intel.com
</td>
</tr>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=73589" name="attach_73589" title="dmesg and DRI log">attachment 73589</a> <a href="attachment.cgi?id=73589&action=edit" title="dmesg and DRI log">[details]</a></span>
dmesg and DRI log
triple display issue on IvyBridge platform ( i5-3470T + Q77 ).
While xorg configured as 1920x1080@60Hz x 3, Ivy bridge platform randomly can't
bring up DP3/HDMI2 port and the fail-rate is about 50%.
Tried following Linux distribution:
* Yocto 1.3 x86_64 with IvyBridge BSP. (Kernel 3.4.11)
* Ubuntu 12.10 x86_64 with intellinuxgraphic 12Q4 driver. (Kernel 3.6.5)
Increased the logbuffer size with log_buf_len=4M but it seems like i915 kernel
module will clear dmesg.
dump dmesg between every time when start/stop xorg.
The 6th time I stopped xorg, DP1 port failed to display in text mode.
Please see attached file "dmesg.12.log" and files in "DRI_LOG_dmesg.12.log".
Then 7th time I start xorg, DP1 still not display any signal.
Please see attached file "dmesg.13.log" and files in "DRI_LOG_dmesg.13.log".
Then 8th time I stopped xorg, DP1 came back in text mode.
Please see attached file "dmesg.14.log" and files in "DRI_LOG_dmesg.14.log".</pre>
</div>
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