[Bug 36030] New: QXL driver crash when enabling/disabling second monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36030

           Summary: QXL driver crash when enabling/disabling second
                    monitor
           Product: Spice
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: critical
          Priority: medium
         Component: win32 qxl
        AssignedTo: spice-bugs at lists.freedesktop.org
        ReportedBy: marcandre.lureau at gmail.com


It is fairly easy to cause a crash of the QXL driver, which reboots the VM
immediately (not even enough time to read the blue screen)

Tested only with:

Windows XP Pro 2002, SP3
QEMU 0.14.50 from spice.v32.kvm branch
QXL driver v1.14.1 9/29/2010

Started the VM with agent support, and two monitors this way:
qemu-system-x86_64 --enable-kvm -net nic -net user -m 512 -localtime -usb 
-device usb-tablet -device AC97 -spice
port=5932,disable-ticketing,x509-key-file=server-key.pem,x509-key-password=redhat,x509-cert-file=server-cert.pem,x509-cacert-file=ca-cert.pem
-vga qxl  -device virtio-serial -chardev
spicevmc,id=vdagent,debug=0,name=vdagent -device
virtserialport,chardev=vdagent,name=com.redhat.spice.0 xp.img 2>&1 -monitor
stdio -device qxl --enable-kvm

Connect with spicec, go to display properties.

1. enable second screen -> second window appears
2. disable second screen -> second window gone
3. enable second screen -> VM crash, blue screen and reboot

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