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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915] Screen freezes (X still works) after switch from EFI VGA to inteldrmfb, if booted with DP connected, if connected after boot everything works."
href="https://bugs.freedesktop.org/show_bug.cgi?id=100385">100385</a>
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<th>Summary</th>
<td>[i915] Screen freezes (X still works) after switch from EFI VGA to inteldrmfb, if booted with DP connected, if connected after boot everything works.
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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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>
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<th>Reporter</th>
<td>fdsktop@rtur.org
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=130448" name="attach_130448" title="dmesg boot log with DisplayPort connected">attachment 130448</a> <a href="attachment.cgi?id=130448&action=edit" title="dmesg boot log with DisplayPort connected">[details]</a></span>
dmesg boot log with DisplayPort connected
Configuration:
Lenovo x230 on a Ultrabase series 3 docking station,
connected to a LG 22MP57VQ-P Display through a
DisplayPort to DVI-D adapter.
I'm running Arch Linux with the current drm-tip
kernel 4.11.0-1.
Problem Description:
If I boot with the Display connected through Displayport,
the console output freezes after the message:
fb: switching to inteldrmfb from EFI VGA
I still can log in at this point and the display works
again as soon as X is started (see dmesg_DP_connected_boot
attachment). But if I try to switch to a TTY the
screen goes blank, if switched back to X everything works again.
If I boot without the Displayport connection everything works,
nothing freezes. Even after attaching the display
through DisplayPort everything works (TTY switch works also).
(see dmesg_DP_connected_after_boot attachment in my next comment.)
Steps to reproduce:
Boot with Displayport connected Display.
If I forgot some important information please let me know and
I'll provide it, also if you need a tester for this I would
gladly be of assistance.</pre>
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