QEMU from git apparently is fixed, but Ubuntu's version is still problematic.
Using an Xubuntu 18.04 guest, it's possible to reproduce the crash using: while true ; do xrandr --output Virtual-0 --mode 640x480 ; sleep 1 ; xrandr --output Virtual-0 --mode 1280x720 ; sleep 1 ; xrandr --output Virtual-0 --mode 1920x1080 ; sleep 1 ; done In less than 20 seconds the guest crash with: (process:16447): Spice-CRITICAL **: 15:34:52.047: display-channel.c:2035:display_channel_update: condition `display_channel_validate_surface(display, surface_id)' failed Abortado (imagem do núcleo gravada) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1755912 Title: qemu-system-x86_64 crashed with SIGABRT when using option -vga qxl Status in QEMU: New Status in qemu package in Ubuntu: Confirmed Bug description: When using qemu-system-x86_64 with the option -vga qxl, it crashes. The easiest way to crash it is by trying to change the guest's resolution. However, the system may randomly crash too, not happening only when changing resolution. Here is the terminal output of one of these random crashes: -------- $ qemu-system-x86_64 -hda /dev/sdb -m 2048 -enable-kvm -cpu host -vga qxl -nodefaults -netdev user,id=hostnet0 -device virtio-net-pci,id=net0,netdev=hostnet0 WARNING: Image format was not specified for '/dev/sdb' 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. (process:21313): Spice-WARNING **: 16:01:45.759: display- channel.c:2431:display_channel_validate_surface: canvas address is 0x7f8eb948ab18 for 0 (and is NULL) (process:21313): Spice-WARNING **: 16:01:45.759: display-channel.c:2432:display_channel_validate_surface: failed on 0 (process:21313): Spice-CRITICAL **: 16:01:45.759: display-channel.c:2035:display_channel_update: condition `display_channel_validate_surface(display, surface_id)' failed Abortado (imagem do núcleo gravada) -------- I was running QEMU as a normal user which is on the groups kvm and disk. Initially I supposed the problem was because I was running QEMU as root, but as a normal user this happens too. I have tested with guests with different Ubuntu version: 18.04, 17.10 and 16.04. It is happening with them all. ProblemType: Crash DistroRelease: Ubuntu 18.04 Package: qemu-system-x86 1:2.11+dfsg-1ubuntu4 ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3 Uname: Linux 4.15.0-10-generic x86_64 ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 CurrentDesktop: XFCE Date: Wed Mar 14 17:13:52 2018 ExecutablePath: /usr/bin/qemu-system-x86_64 InstallationDate: Installed on 2017-06-13 (273 days ago) InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) KvmCmdLine: COMMAND STAT EUID RUID PID PPID %CPU COMMAND MachineType: LENOVO 80UG ProcCmdline: qemu-system-x86_64 -hda /dev/sdb -smp cpus=2 -m 512 -enable-kvm -cpu host -vga qxl -nodefaults -netdev user,id=hostnet0 -device virtio-net-pci,id=net0,netdev=hostnet0 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-10-generic.efi.signed root=UUID=6b4ae5c0-c78c-49a6-a1ba-029192618a7a ro quiet Signal: 6 SourcePackage: qemu StacktraceTop: () at /usr/lib/x86_64-linux-gnu/libspice-server.so.1 () at /usr/lib/x86_64-linux-gnu/libspice-server.so.1 () at /usr/lib/x86_64-linux-gnu/libspice-server.so.1 () at /usr/lib/x86_64-linux-gnu/libspice-server.so.1 () at /usr/lib/x86_64-linux-gnu/libspice-server.so.1 Title: qemu-system-x86_64 crashed with SIGABRT UpgradeStatus: Upgraded to bionic on 2017-10-20 (145 days ago) UserGroups: adm bluetooth cdrom dialout dip disk kvm libvirt lpadmin netdev plugdev sambashare sudo dmi.bios.date: 07/10/2017 dmi.bios.vendor: LENOVO dmi.bios.version: 0XCN43WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: Toronto 4A2 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40679 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ideapad 310-14ISK dmi.modalias: dmi:bvnLENOVO:bvr0XCN43WW:bd07/10/2017:svnLENOVO:pn80UG:pvrLenovoideapad310-14ISK:rvnLENOVO:rnToronto4A2:rvrSDK0J40679WIN:cvnLENOVO:ct10:cvrLenovoideapad310-14ISK: dmi.product.family: IDEAPAD dmi.product.name: 80UG dmi.product.version: Lenovo ideapad 310-14ISK dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1755912/+subscriptions
