@Boris - in your log I've seen that you also got the Penryn cpu which I find
odd.
"-cpu
Penryn,vme=on,vmx=on,x2apic=on,tsc-deadline=on,xsave=on,hypervisor=on,arat=on,tsc-adjust=on,arch-capabilities=on,skip-l1dfl-vmentry=on
\"
Assuming you also only used default I wonder how it got to that, maybe the
reason for that is the same reason that eventually triggers the error.
But virt-manager/libvirt would usually just do a best-fit (for me
Haswell-noTSX-IBRS).
@Boris and @tstrike Could you both please report:
$ virsh capabilities
$ virsh domcapabilities
$ sudo qemu-system-x86_64 --enable-kvm --nographic --nodefaults -S -qmp-pretty
stdio
{"execute":"qmp_capabilities"}
{"execute":"query-cpu-definitions"}
Note: the command seems to hang as you are on QMP, then just enter the two
commands below one by one. This will add "qemu's explanation why a given cpu is
usable or not"
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https://bugs.launchpad.net/bugs/1866870
Title:
KVM Guest pauses after upgrade to Ubuntu 20.04
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