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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 - Crashes and freezes when switching VTs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102319">102319</a>
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<th>Summary</th>
<td>Crashes and freezes when switching VTs
</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>
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<th>OS</th>
<td>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>General
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>marcin.marcin.m@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>I have a weird problem while switching vts
I have a dual-GPU setup: intel i5-5200U as the default OpenGL renderer and
GeForce 940M as the discrete card. I'm using the intel modesetting driver for
the Intel graphics and xf86-video-nouveau for DRI_PRIME.
If I run SDDM/LXDM as my display manager (on Arch Linux), then switch the TTY
to tty2, then switch back to tty7 (DM), I get only a blinking cursor.
If I run LightDM as my display manager, it survives a tty switch, but if I
start an X server in tty2 and then switch directly to tty7, LightDM crashes.
If I switch tty2 -> tty3 (no x server) -> tty7, on the other hand, the DM does
*not* crash.
The whole problem doesn't occur when using the `nomodeset` kernel option, (i.e.
when my DE runs in software rendering mode)
Whenever I switch the ttys or when I launch the DM I get the following output
in the dmesg log: <a href="https://pastebin.com/FgzZLEGg">https://pastebin.com/FgzZLEGg</a>
I asked about it on #nouveau and I was told that since the intel driver takes
care of the rendering, it is the one to blame here.
On the intel side, the problem occurs with both xf86-video-intel and the
modesetting driver
The problem only occurs with the X server that is launched by a DM. If I run
startx directly from the tty on both vts, everything works correctly.
It is not observed on a machine without nvidia graphics and with intel i5-7500K
as the CPU/integrated GPU, with fairly same software stack.
OS: Arch Linux, DE: Cinnamon</pre>
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