Windows XP Guest's Clock runs slow when other Guest VMs are running

[David Cuddihy]

Repro:

1. Boot my host machine.
2. Start VirtualBox.
3. Start my Windows XP VM. ...I observe the clock is within a second of host's clock. Good!
4. Start a second VM (apparently could be anything: Another Windows, Ubuntu, BSD,...doesn't matter)

...As soon as the second VM starts, the Windows XP VM's system clock falls behind.

5. Stop the second VM.

...As soon as the second VM stops, the Windows XP VM's system clock races ahead until its caught back up with the host's clock.

Host: VirtualBox: 2.2.4 r47978 OS: Ubuntu 9.0.4 Kernel: 2.6.28-13-server Kernel Boot Options: ro quiet splash noht apm=off acpi=off noapic *Note: noht, apm=off acpi=off and noapic added in an attempt to remedy this problem. CPU: AMD Phenon 9950 Quad-Core rev.B3

Guest: OS: Microsoft Windows XP Home Edition Version 2002 SP3 Running: Sun VirtualBox Guest Additions 2.2.4

Attached: The VBox.log for the Windows XP VM.

[David Cuddihy]

Windows XP VM VBox.Log

[Frank Mehnert]

Please reopen if still relevant with VBox 4.1.6.