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In 3.0.10 / 3.0.8, I can't change guest system time, the guest system is Ubunt 9.10/9.04.
If I change to 3.0.6, the system time can be changed.
Virtualbox 3.0.10 / 3.0.8 has some bugs with it ?
Host is windowsXP with SP3

Are the Guest Additions installed? If so, that then prevents the time changes because it syncs with the Host.

Sasquatch wrote:Are the Guest Additions installed? If so, that then prevents the time changes because it syncs with the Host.

I have install guest additions of 3.0.10/3.0.8, but I never tried with VM 3.0.10/3.0.8+ Additions 3.0.6~
I tried to change guest sytem time, but after seconds, the time will change back~

AFAIK the installation of the guest additions installs a time sync and has for every version I can think of.
If you need to have the guest not set to the host time automatically you will need to uninstall the guest additions.

Perryg wrote:AFAIK the installation of the guest additions installs a time sync and has for every version I can think of.
If you need to have the guest not set to the host time automatically you will need to uninstall the guest additions.

That's right. I just run

VBoxManage modifyvm RSASERVER --biossystemtimeoffset +1580000

in order to modify guest clock 26,3 mins (+1580000ms~=26,3 min)
Anyone has a better solution?

Regards forum..

2 questions:

1. I want the guest additions on the Guest OS installed, except for the time. I don't want to sync the time of the Guest that of the Host. Is it possible that I can install the Guest Additons excluding the time?

2. How is it possible to change the time in 3.0.6 version and not in the 3.0.8/3.0.10 versions?

Thanks in advance.

Regards,

Disable GA time-sync by editing the parameters passed to the VirtualBox Guest Additions Service (on Windows guests):

• Open Registry Editor (Start menu>Run...>Type 'regedit' into the 'Open:' field>Click the OK button)
  WARNING: Incorrect editing of the registry can damage your system.
• Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VBoxService
• Double-click on 'ImagePath'
• Change the 'Value data:' field, by adding '--disable-timesync' at the end. It should look like:

  Code: Select all

  system32\VBoxService.exe --disable-timesync

• Click OK
• Either reboot the VM, or stop and then restart the 'VirtualBox Guest Additions Service'

After these steps, timesync will be disabled.
To reenable timesync, repeat the steps but remove the --disable-timesync parameter.

Hi Mark,

I've recently installed virtual box 3.2.8.

I want to use that trick with the registry change, but I can't find the VboxService folder in the path you specified.What should I do?

Thanks.