KVM: 0.774 graphic: 0.659 device: 0.604 semantic: 0.566 architecture: 0.519 network: 0.489 mistranslation: 0.479 i386: 0.412 performance: 0.405 hypervisor: 0.334 x86: 0.313 PID: 0.294 virtual: 0.281 kernel: 0.270 ppc: 0.262 boot: 0.242 user-level: 0.222 socket: 0.214 peripherals: 0.199 files: 0.178 debug: 0.175 assembly: 0.168 permissions: 0.167 vnc: 0.166 VMM: 0.165 register: 0.151 risc-v: 0.133 TCG: 0.112 arm: 0.084 qemu-kvm: -no-reboot option broken in 12.x When using the "-no-reboot" qemu option with kvm, qemu does nothing and immediately exits with no output or error message. If I add the --no-kvm option to the command line, it works as expected. It works fine in 11.0 and 11.1, but I tested all versions of 12.X, and they all have this problem. There is no QEMU version 11.x or 12.x, so I assume this ticket is rather meant for the Ubuntu QEMU package Please give the output of: which qemu dpkg -l | egrep -e "(qemu|kvm)" cat /etc/*-release [Expired for qemu-kvm (Ubuntu) because there has been no activity for 60 days.]