Qemu UEFI and snapshots
Long story short, if you plan on taking snapshots via QEMU/Virt-manager and don't want to rely on cli to do it (there is a work around by using qemu cli + qcow images)
Don't use UEFI on your vm's!
Links with details
Re: [libvirt] [PATCH v2] qemu: snapshot: Forbid internal snapshots with
How to create snapshot with UEFI firmware on virt-manager?
I am using qemu v2.11.1 and libvirt 4.0.0 - both are latest stable for Ubuntu 18.04. The guest is Windows 10 running on Tianocore UEFI firmware. When I tried to take a snapshot on virt-manager, it ...
Livy