Hi, the following is the log of libguestfs-test-tool. It seems that qemu does not even begin to boot with those arguments. I have no idea why. The kernel is a custom kernel, but it at least starts to boot if I leave out all the qemu options. Thanks, Michael $ libguestfs-test-tool ************************************************************ * IMPORTANT NOTICE * * When reporting bugs, include the COMPLETE, UNEDITED * output below in your bug report. * ************************************************************ libguestfs: trace: set_verbose true libguestfs: trace: set_verbose = 0 libguestfs: trace: set_verbose true libguestfs: trace: set_verbose = 0 LIBGUESTFS_TRACE=1 LIBGUESTFS_DEBUG=1 PATH=/home/me/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/opt/eclipse:/media/data/Software/Go/bin XDG_RUNTIME_DIR=/run/user/1000 SELinux: sh: 1: getenforce: not found libguestfs: trace: add_drive_scratch 104857600 libguestfs: trace: get_tmpdir libguestfs: trace: get_tmpdir = "/tmp" libguestfs: trace: disk_create "/tmp/libguestfse7YinH/scratch1.img" "raw" 104857600 libguestfs: trace: disk_create = 0 libguestfs: trace: add_drive "/tmp/libguestfse7YinH/scratch1.img" "format:raw" "cachemode:unsafe" libguestfs: trace: add_drive = 0 libguestfs: trace: add_drive_scratch = 0 libguestfs: trace: get_append libguestfs: trace: get_append = "NULL" guestfs_get_append: (null) libguestfs: trace: get_autosync libguestfs: trace: get_autosync = 1 guestfs_get_autosync: 1 libguestfs: trace: get_backend libguestfs: trace: get_backend = "direct" guestfs_get_backend: direct libguestfs: trace: get_backend_settings libguestfs: trace: get_backend_settings = [] guestfs_get_backend_settings: [] libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" guestfs_get_cachedir: /var/tmp libguestfs: trace: get_hv libguestfs: trace: get_hv = "/usr/bin/qemu-system-x86_64" guestfs_get_hv: /usr/bin/qemu-system-x86_64 libguestfs: trace: get_memsize libguestfs: trace: get_memsize = 1280 guestfs_get_memsize: 1280 libguestfs: trace: get_network libguestfs: trace: get_network = 0 guestfs_get_network: 0 libguestfs: trace: get_path libguestfs: trace: get_path = "/usr/lib/x86_64-linux-gnu/guestfs" guestfs_get_path: /usr/lib/x86_64-linux-gnu/guestfs libguestfs: trace: get_pgroup libguestfs: trace: get_pgroup = 0 guestfs_get_pgroup: 0 libguestfs: trace: get_program libguestfs: trace: get_program = "libguestfs-test-tool" guestfs_get_program: libguestfs-test-tool libguestfs: trace: get_recovery_proc libguestfs: trace: get_recovery_proc = 1 guestfs_get_recovery_proc: 1 libguestfs: trace: get_smp libguestfs: trace: get_smp = 1 guestfs_get_smp: 1 libguestfs: trace: get_sockdir libguestfs: trace: get_sockdir = "/run/user/1000" guestfs_get_sockdir: /run/user/1000 libguestfs: trace: get_tmpdir libguestfs: trace: get_tmpdir = "/tmp" guestfs_get_tmpdir: /tmp libguestfs: trace: get_trace libguestfs: trace: get_trace = 1 guestfs_get_trace: 1 libguestfs: trace: get_verbose libguestfs: trace: get_verbose = 1 guestfs_get_verbose: 1 host_cpu: x86_64 Launching appliance, timeout set to 600 seconds. libguestfs: trace: launch libguestfs: trace: max_disks libguestfs: trace: max_disks = 255 libguestfs: trace: version libguestfs: trace: version = <struct guestfs_version = major: 1, minor: 52, release: 0, extra: , > libguestfs: trace: get_backend libguestfs: trace: get_backend = "direct" libguestfs: launch: program=libguestfs-test-tool libguestfs: launch: version=1.52.0 libguestfs: launch: backend registered: libvirt libguestfs: launch: backend registered: direct libguestfs: launch: backend=direct libguestfs: launch: tmpdir=/tmp/libguestfse7YinH libguestfs: launch: umask=0022 libguestfs: launch: euid=1000 libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" libguestfs: begin building supermin appliance libguestfs: run supermin libguestfs: command: run: /usr/bin/supermin libguestfs: command: run: \ --build libguestfs: command: run: \ --verbose libguestfs: command: run: \ --if-newer libguestfs: command: run: \ --lock /var/tmp/.guestfs-1000/lock libguestfs: command: run: \ --copy-kernel libguestfs: command: run: \ -f ext2 libguestfs: command: run: \ --host-cpu x86_64 libguestfs: command: run: \ /usr/lib/x86_64-linux-gnu/guestfs/supermin.d libguestfs: command: run: \ -o /var/tmp/.guestfs-1000/appliance.d supermin: version: 5.2.2 supermin: package handler: debian/dpkg supermin: acquiring lock on /var/tmp/.guestfs-1000/lock supermin: if-newer: output does not need rebuilding libguestfs: finished building supermin appliance libguestfs: begin testing qemu features libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" libguestfs: checking for previously cached test results of /usr/bin/qemu-system-x86_64, in /var/tmp/.guestfs-1000 libguestfs: loading previously cached test results libguestfs: qemu version: 8.2 libguestfs: qemu mandatory locking: yes libguestfs: qemu KVM: enabled libguestfs: trace: get_backend_setting "force_tcg" libguestfs: trace: get_backend_setting = NULL (error) libguestfs: trace: get_backend_setting "force_kvm" libguestfs: trace: get_backend_setting = NULL (error) libguestfs: trace: get_sockdir libguestfs: trace: get_sockdir = "/run/user/1000" libguestfs: finished testing qemu features libguestfs: trace: get_backend_setting "gdb" libguestfs: trace: get_backend_setting = NULL (error) /usr/bin/qemu-system-x86_64 \ -global virtio-blk-pci.scsi=off \ -no-user-config \ -nodefaults \ -display none \ -machine q35,accel=kvm:tcg,graphics=off \ -cpu max,la57=off \ -m 1280 \ -no-reboot \ -rtc driftfix=slew \ -no-hpet \ -global kvm-pit.lost_tick_policy=discard \ -kernel /var/tmp/.guestfs-1000/appliance.d/kernel \ -initrd /var/tmp/.guestfs-1000/appliance.d/initrd \ -object rng-random,filename=/dev/urandom,id=rng0 \ -device virtio-rng-pci,rng=rng0 \ -device virtio-scsi-pci,id=scsi \ -drive file=/tmp/libguestfse7YinH/scratch1.img,cache=unsafe,format=raw,id=hd0,if=none \ -device scsi-hd,drive=hd0 \ -drive file=/var/tmp/.guestfs-1000/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none,format=raw \ -device scsi-hd,drive=appliance \ -device virtio-serial-pci \ -serial stdio \ -chardev socket,path=/run/user/1000/libguestfsnCrRCh/guestfsd.sock,id=channel0 \ -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \ -append "panic=1 console=ttyS0 edd=off udevtimeout=6000 udev.event-timeout=6000 no_timer_check printk.time=1 cgroup_disable=memory usbcore.nousb cryptomgr.notests tsc=reliable 8250.nr_uarts=1 root=UUID=9ac209f2-797a-49e4-981e-889cc118260e selinux=0 guestfs_verbose=1 TERM=xterm-256color" qemu-system-x86_64: -no-hpet: warning: -no-hpet is deprecated, use '-machine hpet=off' instead \x1bc\x1b[?7l\x1b[2J\x1b[0mSeaBIOS (version 1.16.3-debian-1.16.3-2) Booting from ROM..\x1bc\x1b[?7l\x1b[2J ..... after a long time, it finishes like this: Booting from ROM..\x1bc\x1b[?7l\x1b[2Jlibguestfs: error: appliance closed the connection unexpectedly, see earlier error messages libguestfs: child_cleanup: 0x56237a104ff0: child process died libguestfs: sending SIGTERM to process 806119 libguestfs: qemu maxrss 162080K libguestfs: error: guestfs_launch failed, see earlier error messages libguestfs: trace: launch = -1 (error) libguestfs: trace: close libguestfs: closing guestfs handle 0x56237a104ff0 (state 0) libguestfs: command: run: rm libguestfs: command: run: \ -rf /tmp/libguestfse7YinH libguestfs: command: run: rm libguestfs: command: run: \ -rf /run/user/1000/libguestfsnCrRCh