I'm seeing this on Debian 12 without Wayland or Xorg simply by running

#!/bin/bash

chvt 3
for j in $(seq 80); do
    echo "$(date) starting round $j"
    if [ "$(journalctl --boot | grep "failed to allocate VRAM BO")" != "" ]; 
then
        echo "bug was reproduced after $j tries"
        exit 1
    fi
    for i in $(seq 100); do
        dmesg > /dev/tty3
    done
done

echo "bug could not be reproduced"
exit 0


This allowed me to run git bisect which identified the following commit:


commit 5a838e5d5825c85556011478abde708251cc0776 (refs/bisect/bad)
Author: Gerd Hoffmann <kra...@redhat.com>
Date:   Thu Feb 4 15:57:10 2021 +0100

    drm/qxl: simplify qxl_fence_wait

    Now that we have the new release_event wait queue we can just
    use that in qxl_fence_wait() and simplify the code a lot.

    Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
    Acked-by: Thomas Zimmermann <tzimmerm...@suse.de>
    Link: 
http://patchwork.freedesktop.org/patch/msgid/20210204145712.1531203-10-kra...@redhat.com

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-qxl in Ubuntu.
https://bugs.launchpad.net/bugs/1972914

Title:
  frequent 15-sec guest freeze with ubuntu 22.04 host and guest

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-qxl/+bug/1972914/+subscriptions


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