Sets the number of display devices available through SPICE. This is only valid when qxl is set.
The default configuration enables a single display device:
qxl_dev_nr = 1
Note that due to a limitation in the current Autotest code (see client/virt/kvm_vm.py) this setting is only applied when the QEMU syntax is:
# qemu -qxl 2
and not applied when the syntax is:
# qemu -vga qxl
No other documentation currently references this configuration key.