Hi. I'm using the latest qemu release 1.4.0 and libvirt 1.0.4.
The host system is a Ubuntu 12.04 LTS system, Intel Xeon processor, 4GB RAM. When trying to install Windows XP I constantly receive this error (usually right before the graphical Setup is started). Once, I've seen this error too: hw/lsi53c895a.c:351: lsi_soft_reset: Assertion `((&s->queue)->tqh_first == ((void *)0))' failed. I found the thread here http://lists.gnu.org/archive/html/qemu-devel/2012-11/msg00518.html but it didn't led me nowhere. I recompiled with DEBUG_SCSI and DEBUG_LSI enabled. Here's the command libvirt put together and the last few lines of output. I can provide the complete log if you need it. LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOME=/root USER=root LOGNAME=root QEMU_AUDIO_DRV=none \ /home/build/qemu/x86_64-softmmu/qemu-system-x86_64 -name WindowsXP-pro-xp3-sp3 -S -M pc-1.0 -cpu coreduo -enable-kvm -m 1024 \ -smp 1,sockets=1,cores=1,threads=1 -uuid e54b0ce1-fb1e-3faf-d05e-cfa2ed1837ab -no-user-config -nodefaults \ -chardev socket,id=charmonitor,path=/usr/local/var/lib/libvirt/qemu/WindowsXP-pro-xp3-sp3.monitor,server,nowait \ -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-reboot -no-shutdown \ -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \ -device lsi,id=scsi0,bus=pci.0,addr=0x4 \ -drive file=/dev/vm-storage/winxpro-de,if=none,id=drive-scsi0-0-0,format=raw \ -device scsi-hd,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0,bootindex=2 \ -drive file=/var/lib/libvirt/images/winxpprosp3-de.iso,if=none,id=drive-scsi0-0-1,readonly=on,format=raw \ -device scsi-cd,bus=scsi0.0,scsi-id=1,drive=drive-scsi0-0-1,id=scsi0-0-1,bootindex=1 \ -netdev tap,fd=20,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:05:4f:1b,bus=pci.0,addr=0x3 \ -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 \ -device usb-tablet,id=input0 -vnc 127.0.0.1:1 -k de -vga std -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 [...] lsi_scsi: SCRIPTS dsp=febf0588 opcode e2100004 arg febf0044 lsi_scsi: Store reg 0x10 size 4 addr 0xfebf0044 lsi_scsi: SCRIPTS dsp=febf0590 opcode e1100004 arg febf0048 lsi_scsi: Load reg 0x10 size 4 addr 0xfebf0048 = 0676e308 lsi_scsi: SCRIPTS dsp=febf0598 opcode f25c0004 arg 00000000 lsi_scsi: Load reg 0x10 size 4 addr 0xfebf0048 = 0676e308 lsi_scsi: SCRIPTS dsp=febf0598 opcode f25c0004 arg 00000000 lsi_scsi: Store reg 0x5c size 4 addr 0x0676e308 lsi_scsi: SCRIPTS dsp=febf05a0 opcode f11c0004 arg 00000004 lsi_scsi: Load reg 0x1c size 4 addr 0x0676e30c = 0676e310 lsi_scsi: SCRIPTS dsp=febf05a8 opcode e21c0004 arg febf0048 lsi_scsi: Store reg 0x1c size 4 addr 0xfebf0048 lsi_scsi: SCRIPTS dsp=febf05b0 opcode e1100004 arg febf0044 lsi_scsi: Load reg 0x10 size 4 addr 0xfebf0044 = 0676fe80 lsi_scsi: SCRIPTS dsp=febf05b8 opcode e1dc0004 arg febf0cb8 lsi_scsi: Load reg 0xdc size 4 addr 0xfebf0cb8 = 00000000 lsi_scsi: SCRIPTS dsp=febf05c0 opcode 1e000000 arg 00000028 lsi_scsi: MSG out len=3 lsi_scsi: Select LUN 0 lsi_scsi: SIMPLE queue tag=0x8f lsi_scsi: SCRIPTS dsp=febf05c8 opcode 828b0000 arg 00000018 lsi_scsi: Compare phase 2 == 2 lsi_scsi: Jump to 0xfebf05e8 lsi_scsi: SCRIPTS dsp=febf05e8 opcode 1a000000 arg 00000020 lsi_scsi: Send command len=10 scsi-disk: Command: lun=0 tag=0x1008f data=0x2a scsi-disk: Write (sector 418919, count 8) scsi-disk: Write complete tag=0x1008f more=4096 lsi_scsi: Data ready tag=0x1008f len=4096 lsi_scsi: SCRIPTS dsp=febf05f0 opcode 818b0000 arg 00000020 lsi_scsi: Data ready tag=0x1008f len=4096 lsi_scsi: SCRIPTS dsp=febf05f0 opcode 818b0000 arg 00000020 lsi_scsi: Compare phase 0 == 1 lsi_scsi: Control condition failed lsi_scsi: SCRIPTS dsp=febf05f8 opcode 808a0000 arg 00000018 lsi_scsi: Compare phase 0 == 0 lsi_scsi: Jump to 0xfebf0618 lsi_scsi: SCRIPTS dsp=febf0618 opcode f11c0004 arg 00000004 lsi_scsi: Load reg 0x1c size 4 addr 0x0676fe84 = 0676feb0 lsi_scsi: SCRIPTS dsp=febf0620 opcode e01c0004 arg febf0634 lsi_scsi: Store reg 0x1c size 4 addr 0xfebf0634 lsi_scsi: SCRIPTS dsp=febf0628 opcode 80000000 arg 00000000 lsi_scsi: NOP lsi_scsi: SCRIPTS dsp=febf0630 opcode 88080000 arg 0676feb0 lsi_scsi: Call 0x0676feb0 lsi_scsi: SCRIPTS dsp=0676feb0 opcode 98020000 arg 00000020 lsi_scsi: Compare phase 0 != 0 lsi_scsi: Control condition failed lsi_scsi: SCRIPTS dsp=0676feb8 opcode 08001000 arg 0675b000 lsi_scsi: DMA addr=0x675b000 len=4096 lsi_scsi: SCRIPTS execution stopped lsi_scsi: Reset qemu-system-x86_64: hw/lsi53c895a.c:352: lsi_soft_reset: Assertion `!s->current' failed. 2013-04-12 13:13:21.196+0000: shutting down BTW, I also tried the megasas controller, which gave me a blue screen. Any directions on how to go about solving this would be great. TIA! Claudio -- AV-Test GmbH, Henricistraße 20, 04155 Leipzig, Germany Phone: +49 341 265 310 19 Web:<http://www.av-test.org> Eingetragen am / Registered at: Amtsgericht Stendal (HRB 114076) Geschaeftsfuehrer (CEO): Andreas Marx, Guido Habicht, Maik Morgenstern