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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Regression for Skylake modesetting in kernel 4.4 with 2 Displays of different resolution"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93393">93393</a>
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<th>Summary</th>
<td>Regression for Skylake modesetting in kernel 4.4 with 2 Displays of different resolution
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>kai@stella.at
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=120534" name="attach_120534" title="Kernel Log of failed kms on one display (drm.debug=0x0e)">attachment 120534</a> <a href="attachment.cgi?id=120534&action=edit" title="Kernel Log of failed kms on one display (drm.debug=0x0e)">[details]</a></span>
Kernel Log of failed kms on one display (drm.debug=0x0e)
i am testing kernel 4.4 RC cause of the problems in <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [SKL ] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled"
href="show_bug.cgi?id=89055">Bug 89055</a>. while it looked
very good yesterday today on freshly turning on the computer i noticed a big
regression.
I have 2 displays with different resolution one Full HD display connected via
HDMI, and one 1680x1050 which is connected via DVI.
And with kernel 4.4 on a freshly tuned on system the 1680x1050 Display turns
off itself with an out of range error. i tried it a few times, and it was
completely reproducable as long as the system was freshly turned on, when i
boot once with kernel 4.3 and then reboot with 4.4 then everyting works.
on the last bug someone told me to enable drm.debug=0x0e so i attach a log with
that option turned on, hope it helps.</pre>
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