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I've just installed vSphere 4.1 on an HP ProLiant ML115 G5 Quad-core and am trying to install CentOS 5.5 as a guest system.

However, when the guest boots up I get a calibrate_APIC_clock warning and a kernel panic message.

I've come across this knowledge base article on the vmware website which suggests moving the guest onto another Intel based host (!). Funnily enough I don't have a collection of spare host servers sitting around, so can anyone suggest another solution?

Alternatively, would installing an earlier version of CentOS get around this issue, or would a yum update put me back to square one?

How about BIOS settings, could anything be tweaked there?

Thanks.

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Try to give noapic boot parameter for the VM, for starters.

BTW, the subject of your question says ACPI and the question itself APIC. I guess the correct one would be APIC? :-)

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Whoops, I've corrected the typo, thanks. As for the boot option, I'll try tonight. – Adnan Nov 11 '10 at 14:10
Unfortunately 'noapic' did not work. – Adnan Nov 12 '10 at 9:30
Another parameter worth trying is clock=pit, then. – Janne Pikkarainen Nov 12 '10 at 9:38
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