Problem with AHC driver.

Scott Long scottl at
Fri Jul 25 10:10:39 PDT 2003

Try disabling ACPI.


Adam Kranzel wrote:
> Hi...
> I updated my system last night with make world/make kernel/mergemaster, and 
> the new kernel doesn't seem to work.
> It sits there for a while at "Waiting for SCSI devices to settle" and then 
> gives the following message.
> ahc0: Timedout SCB already complete.
> Interrupts may not be functioning.
> (probe1:ahc:0:1:0): SCB 0x8 - timed out
> It then dumps the card state, which I can copy down if needed, but it'll have 
> to be by hand, since I don't have a serial console.
> An older kernel (May 7th 2003) works fine.
> The controller is:
> ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xd800-0xd8ff mem 
> 0xde000000-0xde000fff irq 15 at device 9.0 on pci0
> aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
> The drives on the card are:
> da0 at ahc0 bus 0 target 8 lun 0
> da0: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device 
> da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da0: 4134MB (8467200 512 byte sectors: 64H 32S/T 4134C)
> and
> cd0 at ahc0 bus 0 target 3 lun 0
> cd0: < CD-R/RW RW7060S 1.50> Removable CD-ROM SCSI-2 device 
> cd0: 3.300MB/s transfers
> The cd-rw drive is external, if that makes any difference.
> I'm pretty sure my cabling and termination are good, as I've been running in 
> this setup for over a year now without any problems.
> The motherboard is an ASUS P5A, with an AMD K6-2/500MHz processor.
> Does anyone have a clue what's wrong, and/or how to fix it?
> I'm happy to provide any debugging information requested, just tell me what 
> you need and how to get it.
> Thanks
>  -Adam
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