Thanks for your reply, I did more tests with this new patch for qxl, but it still doesn't work: http://lists.xen.org/archives/html/xen-devel/2013-01/msg01405.html I get this error in the logs: main_channel_link: add main channel client main_channel_handle_parsed: net test: latency 55.458000 ms, bitrate 680172700 bps (648.663235 Mbps) red_dispatcher_set_cursor_peer: inputs_connect: inputs channel client create id 0, group 0, virt start 0, virt end ffffffffffffffff, generation 0, delta 0 id 1, group 1, virt start 7f2fcf657000, virt end 7f2fd0655000, generation 0, delta 7f2fcf657000 id 2, group 1, virt start 7f2fce42d000, virt end 7f2fce43d000, generation 0, delta 7f2fce42d000 (/usr/sbin/xl:5207): Spice-CRITICAL **: red_memslots.c:94:validate_virt: virtual address out of range virt=0x7f2fd0657398+0xbf slot_id=1 group_id=1 slot=0x7f2fcf657000-0x7f2fd0655000 delta=0x7f2fcf657000 I can provide more details or do more tests if useful. Our test system is Debian Wheezy, with all packages from official repository except seabios 1.7.1 from experimental, spice 0.12.2 and spice-protocol 0.12.3 from experimental but recompiled, xen-unstable (4.3) from source with patch. We tried both qemu 1.3.0 from Xen repository and upstream unstable. The client has spice-client-gtk 0.16, spice 0.12.2, spice-protocol 0.12.3 and usbredirection 0.6 installed. The domU is Debian Wheezy (all packages from official repository) started with these arguments: --- Spawning device-model /usr/lib/xen/bin/qemu-system-i386 with arguments: /usr/lib/xen/bin/qemu-system-i386 -xen-domid 6 -chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-6,server,nowait -mon chardev=libxl-cmd,mode=control -name WHEEZY -k it -spice port=6003,tls-port=0,addr=0.0.0.0,disable-ticketing,agent-mouse=on -vga qxl -global qxl-vga.vram_size=65536 -global qxl-vga.ram_size=65536 -boot order=c -no-acpi -smp 2,maxcpus=2 -device rtl8139,id=nic0,netdev=net0,mac=00:16:3e:46:6b:4f -netdev type=tap,id=net0,ifname=vif6.0-emu,script=no,downscript=no -device virtio-serial-pci,id=virtio-serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,nr=1,bus=virtio-serial0.0,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device intel-hda,id=sound0 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -M xenfv -m 1920 -drive file=/mnt/vm/disks/WHEEZY.disk1.xm,if=ide,index=0,media=disk,format=raw,cache=writeback --- _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/spice-devel