I use the following cmd on rhel6.2 kernel 2.6.32-220.17.1: x86_64-softmmu/qemu-system-x86_64 -hda win8.img -cdrom window_8_pro.iso -m 2048 -L pc-bios -cpu host, it will display the following error: Your PC needs to restart. Please hold down the power button. Error Code: 0x0000005D Parameters: 0x03100A00 0x68747541 0x69746E65 0x444D4163 I also tried the newest rhel6 kernel version: 2.6.32-279.19.1, it bring out the same result. if I try standard kernel 2.6.32 version, it can boot normally. Any suggestions? thanks. Suya. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html