Ok, 15-SP2 host, leap 15.2 guest: $ ./run-gdb.sh Temporary breakpoint 1 at 0x401001: file amd64-init-x87-values.S, line 27. Temporary breakpoint 1, main () at amd64-init-x87-values.S:27 27 nop $1 = 0x9f80 $2 = 0x9f80 28 fwait $3 = 0x9f80 guest kernel is leap152 5.3.18-lp152.57-default, host kernel is 5.3.18-24.43-default and qemu is QEMU emulator version 4.2.0 (SUSE Linux Enterprise 15). I guess I need to try kernel-obs-build-5.9.11-1.1 now.