Hello, it seems latest -current amd64 kernel no longer boots on VirtualBox.
Booting GENERIC from http://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/201902161050Z/amd64/binary/kernel/ stops after detecting CPUs and acpiacad0. After CPU detection there is ERROR: 3591 cycle TSC drift observed. CPU is AMD Ryzen 5 1500X. I can break into ddb, bt command on all CPUs shows they are in idle_loop. It makes no difference if I configure only one CPU for VirtualBox. bt for cpu 0: ddb backtrace --- interrupt x86_stihlt acpicpu_cstate_idle_enter acpicpu_cstate_idle idle_loop bt for cpu1: x86_stihlt acpicpu_cstate_idle_enter acpicpu_cstate_idle cpu_hatch md_root_setconf Booting with -2 switch (no ACPI) gets a bit further, but then has other problems detecting devices. However a few days old GENERIC from http://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/201902131540Z/amd64/binary/kernel/ does boot successfully. (But vioif is broken again, ifconfig just hangs) A lot older kernel (8.99.18, I don't have the exact date) works without problems. Arto