cmate4352 wrote:I've got the exact same problem running LM 14 64 KDE in VB Totally random.
Please post if you find a solution. I'll do the same
Disabling HotCorners in Settings (see above) stopped the workspace switcher popping up. In VirtualBox, machine settings, I changed the video memory to max and enabled 3d acceleration. Seems to be running well with no known lag. Quite useable now, so I will continue using 14/Cinnamon in VB. Also, will install some engineering tools (Octave, PyLab) for an online course that starts in a couple of weeks. I also saw something about changing the Linux kernel's clock frequency from 1000Hz to 100Hz for guest machines to reduce load on the host maching, but I don't think I need that yet.