rgesswein wrote:I'm running Windows XP host and Windows XP guest on a ThinkPad T60p laptop these were clean installs as of two weeks ago and I've been testing various configurations to see how things work.
Interesting though, I did turn the ACPI off after having installed with it enabled. I got a bunch of messages that I needed driver changes, but everything booted properly afterwards on two separate test guest configurations.
ACPI (Advanced Configuration and Power Interface), while best known in portable computers, came as part of the same package that gave us PCI and the Pentium; Windows 95 and NT 4 Workstation were the first Microsoft operating environments to explicitly support ACPI. Most *desktop* motherboards, especially recent ones, work just fine with ACPI enabled in the BIOS (which is why VirtualBox enables it by default). Windows NT 4 and later all support ACPI, so leaving it enabled shouldn't hurt Windows guests; same applies to Linux guests with 2.4 and later kernels.