I am running Windows 10 Technical Preview with VMWare Workstation 11.1. I can't seem to run it in full screen. I have a 4k monitor. I also installed it on Virtual Box and do not have any issues viewing Windows 10 in full screen. Do you know what could be the issue? Thanks.
I'm having similar issue where none of my VMs (Win 8.1 and Win 10) will run in full screen anymore unless I turn off "Accelerate 3D graphics". I'm also running 4K monitor. It all of the sudden quit working so I'm wondering if it had something to do with graphics driver update. I'm running Geforce GTX 970.
I'm having the same issue using the Windows 10 technical preview on a Lenovo Y50-70 (4k laptop with an nVidia 860m GPU) - I just see a black screen with a flickering cursor. As with the previous poster, disabling 3D acceleration seems to work around the issue.
The first thing to check in this case is that you've set enough memory on the graphics adapter.
Settings -> Display -> Memory
Unfortunately I do not know how much memory is required for being able to drive a 4k display, but I would try a high setting. I doubt that the recommended 1GB is sufficient.
edit: also make sure to update to the latest VMware Workstation (11.1.2)
4K resolution is 3840 x 2160 so 8294400 pixels (8mp). 32bits or 4 bytes per pixel = 8294400 * 4 = 31.640625 MB
A single frame buffer therefore requires no more than 32MB to display a 4K image.
Of course there are other complexities for video memory but assuming your physical video hardware has at least 128MB (which is a very conservative figure these days) then the host and the guest should have no problem having hardware assisted frame buffers in video RAM at the same time.
VMware are no doubt at the mercy of the host video subsystem and drivers, but surely its not such a big problem?
Possible userbase is still too small for any serious engineering commitment...