permissions: 0.992 debug: 0.990 other: 0.990 semantic: 0.984 device: 0.982 boot: 0.982 performance: 0.979 PID: 0.976 files: 0.964 network: 0.962 socket: 0.949 graphic: 0.949 KVM: 0.932 vnc: 0.928 qemu core dumped by kvm-spice Hi there, I am trying to use kvm-spice to start the qemu virtual machines. They start fine with the /usr/ bin/kvm command, but when I use the kvm-spice command the VM will not start and the core is dumped. Command I used: kvm-spice -cpu host -enable-kvm -name win-7 -m 3000 -drive file=/var/vmmachines/win-7.img -net nic,model=rtl8139 -net user -localtime -usb -vga qxl -global qxl-vga.vram_size=67108864 -spice port=5901,disable-ticketing -boot d Response: do_spice_init: starting 0.10.1 spice_server_add_interface: SPICE_INTERFACE_MIGRATION spice_server_add_interface: SPICE_INTERFACE_KEYBOARD spice_server_add_interface: SPICE_INTERFACE_MOUSE spice_server_add_interface: SPICE_INTERFACE_QXL red_worker_main: begin display_channel_create: create display channel cursor_channel_create: create cursor channel kvm-spice: /build/buildd/qemu-linaro-1.0.50-2012.03/exec.c:2641: register_subpage: Assertion `existing.mr->subpage || existing.mr == &io_mem_unassigned' failed. Aborted (core dumped) I am running Ubuntu 12.04 sserver for this. Any information about this issue would be appreciated, i'm stuck on this one. Kind regards, Tom Hi, I can't reproduce this on either precise or quantal with the stock packages. Does it crash before starting to boot windows? Can you try installing the qemu-linaro-dbgsym package (per https://wiki.ubuntu.com/DebuggingProgramCrash) and re-run to get a stack trace? Sorry, that debug package would be called qemu-kvm-spice-dbgsym. Hey Serge, thanks for your response. Running the debug module like you asked me to, the attached text file was generated. About the crashing before booting Windows: I have no idea. It starts the VM for about one or two seconds, then dumps the core and kills the VM. I'd like to point out it kills the VM with any OS, not just Windows 7. I've tried this with Ubuntu 12.04 (client and server), Windows XP and I think I also tried it with Windows 2k8 R2. It just crashes the VM if I start it this way. The way I am using it now is by using the /usr/bin/kvm command. The way I installed the server was by using this PPA: https://launchpad.net/~bderzhavets/+archive/lib-usbredir81 Hope you can help, Tom -----Oorspronkelijk bericht----- Van: