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When I run a Kubuntu guest on Windows host in VirtualBox - I only get 60Hz refresh rate on a virtual display. UI feels very slow and laggy compared to native 120/144Hz UI. How can I achieve 120/144Hz display refresh rate inside VM?
Tried both 5.x and latest 6.1.2 versions of VirtualBox, with old and new virtual display drivers, with and without 3D acceleration.
Is there any way to have 144Hz display refresh rate on Kubuntu (or other Linux) guest VM?
I already tried:
xrandr --output VGA-1 --mode 1821x1015 -r 144
In .kwinrc:
MaxFPS=144
RefreshRate=144
with no luck.
I have been digging through similar questions in google search results and there seems to be a consensus that changing the "virtual" display refresh rate from within a VM has no effect. It's basically just a placeholder number in the virtual graphics adapter to satisfy applications that go looking for it. Everything that the guest OS "draws" is forwarded to the host OS through a virtual GPU, so it may only feel "laggy" due to the overhead of emulating a GPU. – Romen – 2020-01-28T23:02:20.017
"I am getting stable 60 FPS in VM" Is vsync on by any chance...? Check out : https://askubuntu.com/questions/764302/screen-tearing-on-kubuntu-16-04-with-intel-drivers
– Natsu Kage – 2020-01-29T04:53:48.150