troubles with Adaptec 2940 on amd64

[Mikhail Teterin]

> > The Adaptec sees the drive (9Gb Cheetah) and I was able to install
> > FreeBSD-5.4-BETA1 without any difficulty. However, after reboot I'm
> > getting:
> > 
> > ahc0: Timedout SCBs already complete. Interrupts may not be functioning
> 
> This typically means that interrupts are not being properly routed
> from the SCSI controller. It may be possible to return to the
> environment of the install kernel by playing with ACPI and APIC
> settings, and thus restore interrupt delivery, but the interrupt
> routing code is really outside of my area...

Yes, indeed. Going into BIOS and enabling ACPI-2.0 solved the problem.

I wonder, how the OS install succeeded without that, however. Thanks!

	-mi