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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 - Kernel DRM/i915 init sends eDP panel into self-test loop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94338">94338</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Kernel DRM/i915 init sends eDP panel into self-test loop
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>infernix@infernix.net
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=122029" name="attach_122029" title="dmesg">attachment 122029</a> <a href="attachment.cgi?id=122029&action=edit" title="dmesg">[details]</a></span>
dmesg
On a Skylake i3-6100T (HP ProOne 400 G2 All-in-One) and todays' linus master
and drm-intel-nightly, the display enters a self-test mode immediately after
booting the kernel, presumably when i915/drm driver gets loaded. It goes into a
full-screen cycle of 2 seconds red, then green, then blue, and loops
infinitely.
Xorg reports it gets initialised, but stays in 1024x768 whereas the panel is
native 1600x900. It boots fine from EFI and grub has no issues displaying
graphics. The panel can be toggled off and on with xrandr but the self-test
remains active.
On 4.3 kernels the panel goes black instead of the red/green/blue self test
cycle.
On 3.16 the panel works in VESA framebuffer mode without issue, in 1024x768.
System info:
- x86_64, 4.5.0-rc5+ with both linus master
(29a9faa641857425af76e44f2fab22db53032401) and drm-intel-nightly
(e511a05b4b3bb4d1dbca99b00af6d0dc0a65d295)
- Debian Jessie (tried 3.16 kernel as well as jessie-backports 4.3 kernel
before using upstream)
- HP ProOne 400 G2 20-in Touch AiO
- eDP connector for built-in panel
Tried with no effect: <a href="http://paste.debian.net/410285/">http://paste.debian.net/410285/</a>
Relevant data attached.</pre>
</div>
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