APIC on AMD Athlon 2500+ Broken?

Lennart Sorensen lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org
Mon Jul 5 20:25:10 UTC 2004

On Mon, Jul 05, 2004 at 03:02:56PM -0400, Tim Writer wrote:
> The BIOS documentation for my home system (single CPU Gigabyte P4) states
> that the BIOS and OS APIC settings must match.  IOW, either APIC is disabled
> in the BIOS _and_ in the OS or it's enabled in the BIOS _and_ enabled in the
> OS.
> In my experience, APIC can be a big deal for single CPU systems.  For
> example, the on-board Promise RAID controller (which I use as additional IDE
> channels) on my home system conflicts with USB unless APIC is enabled in the
> BIOS and kernel.  Without APIC, I'm unable to use the RAID controller at all.

If a PCI device can't share an interrupt, the device or its driver is

I have run a system with usb, adaptec 2940uw, pci video card and 3c905
NIC all on a single IRQ without problems.

Of course I also don't want to use Promise's proprietary software raid

Lennart Sorensen
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