Using '-cpu 486' gets past the assertion error. I guess Windows NT 4.0 is not compatible with newer Intel processors.
Currently I can install Windows NT 4.0, but booting from the installation has its problems. It won't boot unless you use the NTFS file system. Even with this file system I still see a BSOD that states INACCESSIBLE_BOOT_DEVICE. Not sure what is wrong. Switching to a SCSI controller didn't help. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1706296 Title: Booting NT 4 disk causes /home/rjones/d/qemu/cpus.c:1580:qemu_mutex_lock_iothread: assertion failed: (!qemu_mutex_iothread_locked()) Status in QEMU: New Bug description: Grab the NT 4 disk from https://archive.org/details/Microsoft_Windows_NT_Server_Version_4.0_227-075 -385_CD-KEY_419-1343253_1996 Try to boot it as follows: qemu-system-x86_64 -hda disk.img -cdrom Microsoft_Windows_NT_Server_Version_4.0_227-075-385_CD-KEY_419-1343253_1996.iso -m 2048 -boot d -machine pc,accel=tcg WARNING: Image format was not specified for 'disk.img' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. ** ERROR:/home/rjones/d/qemu/cpus.c:1580:qemu_mutex_lock_iothread: assertion failed: (!qemu_mutex_iothread_locked()) Aborted (core dumped) The stack trace in the failing thread is: Thread 4 (Thread 0x7fffb0418700 (LWP 21979)): #0 0x00007fffdd89b64b in raise () at /lib64/libc.so.6 #1 0x00007fffdd89d450 in abort () at /lib64/libc.so.6 #2 0x00007fffdff8c75d in g_assertion_message () at /lib64/libglib-2.0.so.0 #3 0x00007fffdff8c7ea in g_assertion_message_expr () at /lib64/libglib-2.0.so.0 #4 0x00005555557a7d00 in qemu_mutex_lock_iothread () at /home/rjones/d/qemu/cpus.c:1580 #5 0x00005555557cb429 in io_writex (env=env@entry=0x555556751400, iotlbentry=0x55555675b678, iotlbentry@entry=0x5aaaaae40c918, val=val@entry=8, addr=addr@entry=2148532220, retaddr=0, retaddr@entry=93825011136120, size=size@entry=4) at /home/rjones/d/qemu/accel/tcg/cputlb.c:795 #6 0x00005555557ce0f7 in io_writel (retaddr=93825011136120, addr=2148532220, val=8, index=255, mmu_idx=21845, env=0x555556751400) at /home/rjones/d/qemu/softmmu_template.h:265 #7 0x00005555557ce0f7 in helper_le_stl_mmu (env=env@entry=0x555556751400, addr=addr@entry=2148532220, val=val@entry=8, oi=<optimized out>, retaddr=93825011136120, retaddr@entry=0) at /home/rjones/d/qemu/softmmu_template.h:300 #8 0x000055555587c0a4 in cpu_stl_kernel_ra (env=0x555556751400, ptr=2148532220, v=8, retaddr=0) at /home/rjones/d/qemu/include/exec/cpu_ldst_template.h:182 #9 0x0000555555882610 in do_interrupt_protected (is_hw=<optimized out>, next_eip=<optimized out>, error_code=2, is_int=<optimized out>, intno=<optimized out>, env=0x555556751400) at /home/rjones/d/qemu/target/i386/seg_helper.c:758 #10 0x0000555555882610 in do_interrupt_all (cpu=cpu@entry=0x555556749170, intno=<optimized out>, is_int=<optimized out>, error_code=2, next_eip=<optimized out>, is_hw=is_hw@entry=0) at /home/rjones/d/qemu/target/i386/seg_helper.c:1252 #11 0x00005555558839d3 in x86_cpu_do_interrupt (cs=0x555556749170) at /home/rjones/d/qemu/target/i386/seg_helper.c:1298 #12 0x00005555557d2ccb in cpu_handle_exception (ret=<synthetic pointer>, cpu=0x5555566a4590) at /home/rjones/d/qemu/accel/tcg/cpu-exec.c:465 #13 0x00005555557d2ccb in cpu_exec (cpu=cpu@entry=0x555556749170) at /home/rjones/d/qemu/accel/tcg/cpu-exec.c:670 #14 0x00005555557a855a in tcg_cpu_exec (cpu=0x555556749170) at /home/rjones/d/qemu/cpus.c:1270 #15 0x00005555557a855a in qemu_tcg_rr_cpu_thread_fn (arg=<optimized out>) at /home/rjones/d/qemu/cpus.c:1365 #16 0x00007fffddc3d36d in start_thread () at /lib64/libpthread.so.0 #17 0x00007fffdd975b9f in clone () at /lib64/libc.so.6 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1706296/+subscriptions
