timer not connected to IO-APIC

Asked by blackmx on 2007-04-28

when i starts Ubuntu it says:

Starting up...

MP-BIOS bug: 8254 timer not connected to IO-APIC

then load Ubuntu normally...

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Ubuntu linux-source-2.6.20 Edit question
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blackmx (net-surf) said : #1

i don't know if it's a bug... or what it affects...

Cesare Tirabassi (norsetto) said : #2

Is this an nvidia chipset? If so, please make sure it's got the latest BIOS.

blackmx (net-surf) said : #3

no it's ATI
and i have the last bios

btw: hp pavilion 5290EA

Cesare Tirabassi (norsetto) said : #4

Well, the message seems to indicate a BIOS problem (either the PIT not connected to the IO APIC or not being reported correctly: the latter I presume).
In this case the kernel doesn't use it , most probably is using the TSC and/or the ACPI PMT.
You can check this in your dmesg.
If you want to see more info try adding apic=debug as a boot parameter.

Cesare Tirabassi (norsetto) said : #5

By the way, I'm not talking about videocard but motherboard chipset.

Jose Mario (jmfdonato) said : #6

does any one know how to fix it?
please, it's busy me off

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