Bug 1444080

Description of problem:
Additional display of guest VM can not be attached using remote-viewer

Version-Release number of selected component (if applicable):
client/host: rhel7.4beta:
spice-server-0.12.8-1.el7.x86_64
spice-gtk3-0.33-3.el7.x86_64
qemu-kvm-rhev-2.8.0-6.el7.x86_64
virt-viewer-5.0-2.el7.x86_64

guest: win10 64bit
with RHEV-Tools 4.1.5
and spice-qxl-wddm-dod-0.16

/usr/libexec/qemu-kvm -name guest=win10,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu
/domain-19-win10/master-key.aes -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off,dump-guest-core=off -cpu Broadwell,+rtm,+hle,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -m 4096 -realtime mlock=off -smp 2,sock
ets=2,cores=1,threads=1 -uuid 391164e5-0a1e-40b6-ac98-1e3223ee2131 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-19-win10/monitor.sock,server,nowait -mon chardev=ch
armonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -boot strict=on -devic
e ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -de
vice ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/home/rduda/Virtualky/win10.qcow2,format=qcow2,if=none,id=drive-i
de0-0-0 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive file=/home/rduda/Virtualky/RHEV-toolsSetup_4.1_5.iso,format=raw,if=none,id=drive-ide0-0-1,readonly=on -device ide-cd,bu
s=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -netdev tap,fd=27,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:7d:7a:f7,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chard
ev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0,bus
=usb.0,port=1 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_output
s=1,bus=pci.0,addr=0x2 -device qxl,id=video1,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pci.0,addr=0x8 -device qxl,id=video2,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pci.0,addr=0x9 -device qxl,id=video3,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pci.0,addr=0xa -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on


How reproducible:
always


Steps to Reproduce:
1. run VM guest with >1 qxl video devices
2. connect to it with remote-viewer
3. check additional display from remote-viewqer drop down menu ( View -> Displays-> Display 2)

Actual results:
Blank window of remote-viewer pops up 

Expected results:
Display is attached and correctly displayed via remote-viewer


Additional info:
Display can be attached from within guest: Settings -> Advenced display settings -> Extend desktop to this display