Apologies if this list is inappropriate, I've failed to come across anything pertinent via Google. If anyone can suggest a more appropriate forum please do. I'm having a problem starting KVM guests since performing a routine apt-get upgrade on a debian jessie system. On starting a guest via virt-manager I'm getting the below error. The same behaviour is seen with existing guests or newly created guests. Could anyone point me towards a solution, or debug course? Thanks... Error starting domain: internal error: QEMU / QMP failed: Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-iscsi.so: undefined symbol: aio_bh_schedule_oneshot Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-curl.so: undefined symbol: aio_bh_schedule_oneshot Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-rbd.so: undefined symbol: aio_bh_schedule_oneshot Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-ssh.so: undefined symbol: inet_connect_saddr Could not access KVM kernel module: Permission denied failed to initialize KVM: Permission denied Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 91, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 127, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1355, in startup self._backend.create() File "/usr/lib/python2.7/dist-packages/libvirt.py", line 999, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: internal error: QEMU / QMP failed: Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-iscsi.so: undefined symbol: aio_bh_schedule_oneshot Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-curl.so: undefined symbol: aio_bh_schedule_oneshot Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-rbd.so: undefined symbol: aio_bh_schedule_oneshot Failed to open module: /usr/lib/x86_64-linux-gnu/qemu/block-ssh.so: undefined symbol: inet_connect_saddr Could not access KVM kernel module: Permission denied failed to initialize KVM: Permission denied