Date-Time not persisting in CentOS vm while host hibernates

[Krosty]

I noticed that when my host goes to hibernation, my running guest VMs' system clocks get out of sync. So I have to reset it every time in individual boxes, which is annoying. Any permanent fix for this?

[mpack]

Sure, the best fix is never to hibernate. Other than that, AFAICS, VBox can't control how often each guest OS reads the RTC.

[Krosty]

Will using network time make a difference?

[mpack]

Depends how often the guest checks network time.

[Krosty]

Sometimes people use their personal boxes to try out different OSs with VirtualBox. So putting your machine on hibernation cannot be avoided. This sounds like a good feature for VirtualBox to implement - detect when host machine has woke up and then resync all running guest VMs' clocks.