[Bug 103474] Hard lock when unplugging and reconnecting external USB-C DP display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103474

--- Comment #7 from Daniel Playfair Cal <daniel.playfair.cal at gmail.com> ---
Created attachment 135137
  --> https://bugs.freedesktop.org/attachment.cgi?id=135137&action=edit
Stacktrace of gnome-shell user session crash when disconnecting the display

It does say "Connection to xwayland lost"

If XWayland can't handle a display being unplugged,then why is it that when I
unplug a display without using this usb-c to displayport adapter my shell
usually doesn't crash? And how can I see why XWayland crashed?

I updated my BIOS and thunderbolt controller firmware to the latest, I'm not
sure if it made any difference.

I tried disabling my display manager, booting into a console, and disconnecting
and reconnecting the screen repeatedly. In that case, everything works fine.

Unfortunately the coredump for the second gnome-shell crash never seems to
complete. When it crashes after reconnecting the displayport adapter, often the
caps lock light flashes on and off repeatedly for a few seconds, then the power
light turns off (but the screen statys on). The image of the display manager
flashed back on the screen, and then turned black. Next I saw the post screen
(power light still off) for a few seconds, then the computer turned off.

My microcode should be up to date - my bootloader is configured as follows:
linux /vmlinuz-linux
initrd /intel-ucode.img
initrd /initramfs-linux.img

and I have intel-ucode 20170707-1 which is the latest for Arch.

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