Edgar Fuß wrote:
> It looks like I'm having massive interrupt routing problems on a Tyan S2882-D
> board running 4.0beta2/amd64.
>
> Everything worked fine as long as I was only using the first SCSI channel (ahd0)
> but then I connected eight disks to the second channel (ahd1) and, under high
> I/O load, got lots of "timedout scb is alrady complete. Interrupts may not be
> functioning" messages.
>
> Suspecting ACPI problems, I updated my BIOS.
> The good news is that the problems on ahd1 disappeared.
> The bad news is I'm now getting exactly the same problems on ahd0.
> Also, I get "block failed to stop" messages on bge0, and dmesg says that bge0
> and ahd0 share the same interrupt (I hadn't be using bge1, which shares a line
> with ahd1).
>
> Any ideas how to debug this? Anything like acpilint to check if the BIOS's
> interrupt routing information is sane?
>   
You can dump the ACPI tables with acpidump (it's in pkgsrc), and send 
them to the list. You can also google for problems with ACPI on this 
board, and perhaps find replacment tables.

- Frank