Hello I have a standalone oVirt Manager 4.5.5-1.el8 and two small clusters. After upgrading ovir01001 in the "PreProd" cluster from AlmaLinux 8.8 to 8.9, the host was successfully activated but failed to take any VM. centos-release-ceph-pacific.noarch 1.0-2.el8 @cs8-extras centos-release-gluster10.noarch 1.0-1.el8s @cs8-extras-common centos-release-nfv-common.noarch 1-3.el8 @cs8-extras centos-release-nfv-openvswitch.noarch 1-3.el8 @cs8-extras centos-release-opstools.noarch 1-12.el8 @cs8-extras centos-release-ovirt45.noarch 8.9-1.el8s @cs8-extras-common centos-release-storage-common.noarch 2-2.el8 @cs8-extras centos-release-stream.x86_64 8.1-1.1911.0.7.el8 @cs8-extras centos-release-virt-common.noarch 1-2.el8 @cs8-extras vdsm.x86_64 4.50.5.1-1.el8 @centos-ovirt45 The problem has been "solved" by downgrading all qemu-* packages to the version in AlmaLinux 8.8 ie. qemu-kvm-6.2.0-40.module_el8.9.0+3681+41cbbcc0.1.alma.1 => qemu-kvm-6.2.0-33.module_el8.8.0+3612+f18d2b89.alma.1.x86_64 Please find the relevent log: - engine_when_failed.log https://pastebin.com/7MG6fYGY - engine_when_ok.log https://pastebin.com/MegqmMbg - vdsm_when_failed.log https://pastebin.com/ae4w0pix - vdsm_when_ok.log https://pastebin.com/d7P0BWDN Regards -- ,-~~-.___. ._. / | ' \ | |--------. Christophe GRENIER ( ) 0 | | | grenier@cgsecurity.org \_/-, ,----' | | | ==== !_!-v---v--. / \-'~; .--------. TestDisk & PhotoRec / __/~| ._-""|| | Data Recovery =( _____|_|____||________| https://www.cgsecurity.org