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Old 10-12-2005, 07:31 AM   #1
Registered: Aug 2005
Location: Manchester, England
Distribution: Ubuntu 17.04
Posts: 303

Rep: Reputation: 25
APIC error on AMD 64-bit Debian

I just upgraded to the AMD-64 bit optimised verion of Debian but I get a load of errors on start up saying: APIC error on cpuo 40(40) I've googled around and found the following post
Your boot log reveals that you're
> using ACPI and IO-APIC on a SiS chipset. Disable those and try
> again -- I wouldn't bet on ACPI+IO-APIC working on SiS.
How do I do this, especially as I can't boot past this stage (it just scrolls these messages up the screen for ages).

Please help,
Old 10-19-2005, 01:24 PM   #2
Registered: Aug 2005
Location: Manchester, England
Distribution: Ubuntu 17.04
Posts: 303

Original Poster
Rep: Reputation: 25
For a time I got past this bit and could boot normally into Linux. I just switched it on one day and it worked, albeit with the message still popping up erratically on startup but not nearly as much as before. Now though, I'm back to square one with exactly the same problem as described above but having made no obvious changes to the system that could have caused this.
please help
Old 10-20-2005, 12:16 AM   #3
Registered: Sep 2004
Location: Barcelona
Distribution: Debian, FreeBSD, Gentoo
Posts: 586

Rep: Reputation: 30
try setting noapci and nolapic on bootup. Edit your /boot/grub/menu.lst and on the line that says kernel (for your current kernel) add "noapic nolapic" so it should look somethingl ike this:
kernel          /vmlinuz-2.6.10-master-r2 root=/dev/hda4 ro noapic nolapic
This disables apic and lapic on boot up, without these flags for example the A7N8X-X motherboards wont work properly (gives you DMA timer expiry's like crazy). Try it.


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