The vmwgfx kernel module does not support devices without the pitchlock capability. Sorry. In that case you need to use the xf86-video-vmware driver standalone without kernel modesetting.
So presumably this is some capability to be added to the qemu device
The kernel bugzilla response is:
The vmwgfx kernel module does not support devices without the pitchlock capability. Sorry. In that case you need to use the xf86-video-vmware driver standalone without kernel modesetting.
So presumably this is some capability to be added to the qemu device