For any poor saps that encounter this in the future in a similar situation, replacing the graphics driver with 'virtio' in the KVM/qemu config fixes this:
<video> <model type='virtio' vram='16384' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> Instead of the default 'cirrus' or whatever. Found this in my age-old notes from the last time I encountered this problem a year ago. I'm not sure whether this triggered a cache clear or whether the bit depth is different or what... -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1766938 Title: gnome-shell crashed in mutter:ERROR:x11/iconcache.c:303:standard_pict_format_for_depth: code should not be reached To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1766938/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs