Comment # 27 on bug 974627 from Fabian Vogt

Me and Dominique did some more tests:

- While the issue occurs with "qemu-kvm -m 2048 -cdrom <iso>", it works with
"-smp 2" added -> Race condition

- Using mwm (Motif) fixes the issue as well (can upload the dud if anyone wants
to try)

Everything points to IceWM being the culprit, likely the upstream report
https://github.com/bbidulock/icewm/issues/37