I see in my original bug report I did not mention that I was using Xen: release : 4.19.0-8-amd64 version : #1 SMP Debian 4.19.98-1+deb10u1 (2020-04-27) machine : x86_64
I was able to upgrade most other qemu- packages, but the inability to create new hvm domUs reappeared when I upgraded the -x86 package. The -data and -gui packages seem to work hand in hand with it, so I have downgraded all three. The problem does not seem to affect pv domUs - I was able to create one of those. Let me know if you'd like me to do more troubleshooting, Dave
