[Bug]: Incorrect/mismatching client refresh rate

[enginelesscc]

Version

7.2.8

Host OS Type

Windows

Host OS name + version

Any Build Any

Host Architecture

x86

Guest OS Type

Windows

Guest Architecture

x86

Guest OS name + version

Any Build Any

Component

GUI

What happened?

Guests have a refresh rate of 60hz (16.66667ms), however.. the client gui is only at 50hz:

https://github.com/VirtualBox/virtualbox/blob/main/src/VBox/Main/src-client/DisplayImpl.cpp#L4057
https://github.com/VirtualBox/virtualbox/blob/main/src/VBox/Frontends/VBoxBFE/Display.cpp#L420

1000/20 = 50hz

This contributes to vbox feeling jarring, slower and inconsistent and should be set to 16 (= 62.5hz) instead (goal: client refresh >= guest refresh).

How can we reproduce this?

/

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.

[enginelesscc]

Ideally, the refresh rate should be configurable if one may choose a higher one (such as 125hz, ~8ms), as it is very difficult to modify right now because of this .... vbox hardening at the host, but easy inside the guest.