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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 --- - [I830M] KMS sets garbage video mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76770">76770</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[I830M] KMS sets garbage video mode
</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>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mroos@linux.ee
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=96579" name="attach_96579" title="dmesg">attachment 96579</a> <a href="attachment.cgi?id=96579&action=edit" title="dmesg">[details]</a></span>
dmesg
Somewhere after 3.12, KMS has started to set garbage video mode with too large
letters and vertical offset on Thinkpad X30 with Intel 830M graphics. 3.14-rc8
is still problematic.
Bisecting is tricky - it seems the bug only happens with some kernels but not
others from the buggy range. I did 2 bisections, one from 3.13 to 3.12 and one
from first known-bad commits to 3.12 with lastest gcc 4.8 from Debian unstable.
These lead me to differnet results that both reside in lustre commits, but
lustre is not compiled for this laptop at all.
Same kernel that exhibits the bug seems to exhibit it always.
When X starts, it sets normal graphics mode and works with no problems.
Attached are dmesg with drm.debug=0x0e, lspci -vvv, config and 2 bisection
logs.</pre>
</div>
</p>
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