Hi Christian, sorry but we still got the issue with the test provided by Louis.
qmp_shell/> blockdev-snapshot-sync device=disk0 snapshot-file=tmp.qcow2 format=qcow2 {} qmp_shell/> block-commit device=disk0 base=top-vm01.img GenericError: Failed to get "write" lock qmp_shell/> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1837869 Title: Cannot complete snapshot if read-only backing store is opened by another VM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1837869/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs