It seems that when I want to run qemu-system-x86_64 on a node via ssh -Y, I have to connect to the guest via VNC. So, here is an example:

[mahmood@rocks7 ~] ssh -Y compute-0-0
[mahmood@compute-0-0 ~] qemu-system-x86_64 -m 4096 -hda win7_x64_snap.img -boot c -usbdevice tablet -enable-kvm -device e1000,netdev=host_files -netdev user,net=,id=host_files,restrict=off
qemu-sqemu-system-x86_64: warning: host doesn't support requested feature:    CPUID.80000001H:ECX.tbm [bit 21]
VNC server running on

As you can see, although I haven't specified vnc option for qemu, it shows a message that I have to connect via vnc.

Is there any way to directly bring up the guest window? If I run that command on the main node (without ssh), then the guest window is shown quickly.

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