CI is failing (qemu test case)

The qemu test case stopped working in our CI setup for some reason. It did work just before !1784 (merged) was merged, and directly after it was merged, it started failing. It works fine locally for me:

$ pytest test/test_qemu_running_processes.py -vv -x

The patch seems completely unrelated.

The test case does a full XFCE4 install, starts it in qemu, connects with SSH and looks at the running processes. It does the same with plasma mobile then. Looks like it is working for xfce4, but for plamo it is stuck somewhere in the boot process?

• https://postmarketos.gitlab.io/-/pmbootstrap/-/jobs/210913174/artifacts/log_testsuite.txt
• https://gitlab.postmarketos.org/postmarketos/pmbootstrap/-/jobs/210913174/artifacts/browse
• https://gitlab.postmarketos.org/postmarketos/pmbootstrap/-/jobs/210913174/

I've started the test multiple times, just to make sure, and now it is consistently failing in CI.

@craftyguy, it would be awesome if you could look into that. Let me know if I can help with figuring this out, and how.