Adding a ditto to this. == Command and output ==
$ qemu-system-x86_64 -m 2G -hda mydisk.vdi -accel hvf -vga std qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2] Unimplemented handler (7fe3aac905e8) for 0 (f 11) This is for a customized Ubuntu install. == Symptoms == Guest window repeatedly alternates between the desktop, then flickers to terminal with the following text: /dev/sda4: recovering journal /dev/sda4: clean, 93356/1264800 files, 1076062/5056592 blocks [ OK ] Started xrdp session manager. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started Terminate Plymouth Boot Screen. [ OK ] Started Hold until boot process finishes up. == Host system == - macOS 10.14.6 - Bluetooth mouse and keyboard Also, the workaround of using -cpu host,-mmx,-sse doesn't work (the guest appears to never even boot). -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1798451 Title: MMX emulation is missing on HVF Acceleration Status in QEMU: New Bug description: Robs-MacBook-Pro-2:~ robmaskell$ qemu-system-x86_64 --version QEMU emulator version 3.0.0 Host: MacOS - 10.13.6 Model Name: MacBook Pro Model Identifier: MacBookPro14,3 Processor Name: Intel Core i7 Processor Speed: 2.8 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 6 MB Memory: 16 GB Guest OS: Elementary Linux Loki 0.4.1, patched up to date Command used to start QEMU: qemu-system-x86_64 \ -name ElementaryLokiDev \ -machine pc,accel=hvf \ -cpu max \ -smp cpus=2,sockets=2,cores=1,threads=1,maxcpus=2 \ -numa node,nodeid=0 \ -numa cpu,node-id=0,socket-id=0 -numa cpu,node-id=0,socket-id=1 \ -m 8G \ -vga vmware \ -hda e4.qcow2 Symptoms: Started without the -smp / -numa commands to install the OS, then added -smp / -numa and the machine boots and lscpu reports extra cpu as expected. Restart VM and it hangs on startup. Remove -smp / -numa and machine starts again. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1798451/+subscriptions
