I have an Ubuntu host machine with virtual box installed. For software testing purposes I have a virtual machine with Ubuntu Server 14.04 and official Virtual Box guest additions installed. And I need to speed up virtual machine clock say 4x times. I have found this article.


But time still goes with same speed (date utility). What could be the problem? Does anyone have any other solutions to speed up clock in ubuntu virtual machine?

  • Did you also disable TimeSync of the guest to host? – Takkat Jan 20 '15 at 11:01

It works!

I have disabled time sync with following commands:

VBoxManage setextradata "VM Name" VBoxInternal/Devices/VMMDev/0/Config/GetHostTimeDisabled 1
VBoxManage setextradata "VM Name" VBoxInternal/TM/TSCTiedToExecution 1
VBoxManage setextradata "VM Name" VBoxInternal/TM/WarpDrivePercentage 400 # means 4x times faster

Note, in Virtual Box 4.3.x you need to enter parameters without quotes (see comments here).

Also you need totally power off and start the virtual machine… Simple reboot for some reason didn't work.

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