[vbox-dev] Can ACPI and IO APIC options be eliminated?

Achim Hasenmueller achim at sun.com
Tue Sep 15 03:15:29 PDT 2009

We'll remove the ACPI option from the GUI in the next release.  
However, the IOAPIC option is still important as enabling it can cause  
a significant overhead on older Intel CPUs and all AMD CPUs for 32bit  
guests. We've addressed the overhead on most cases but there are still  
reasons why you want to disable it.


On Sep 15, 2009, at 2:53 , Huihong Luo wrote:

> Any chance to remove them? and vbox does some kind of automatic check?
> I noted that VMware and Virtua PC don't have these kind of options.
> These two options always give me problems.
> e.g., on a single vm with dual boot XP and Vista. Vista requires IO  
> APIC whereas XP does not need it. So have to keep changing these  
> options in order to make them to boot.
> This may not be a big issue for vms created from OS CDs, but a  
> really annoying issue for P2V VMs.
> I was just curious how VMware/VPC deal with them  without providing  
> such options?
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