Re: aic79xx -> can't suspend

From: Lee Revell
Date: Thu Jun 23 2005 - 19:33:51 EST

On Thu, 2005-06-23 at 15:32 -0400, Jim Crilly wrote:
> On 06/23/05 01:51:43PM -0400, Lee Revell wrote:
> > I have a machine with an Adaptec 2940U2W adapter running 2.6.11.
> > When I try to go into standby like so:
> >
> > echo standby > /sys/power/state
> >
> > this is what happens:
> AFAIK no SCSI drivers have had power management functions implemented,
> a quick grep for PM_ in drivers/scsi seems to confirm that only the
> PCMCIA SCSI drivers even look for PM events.

Actually it is implemented in the aic7xxx driver, see ahc_suspend and

I tried it with 2.6.12, and I no longer have the problem with the ahc_dv
thread as it no longer exists (AFAICT the functionality is handled by
the SCSI midlayer now?).

Now it just immediately resumes:

[4297399.286000] PM: Preparing system for standby sleep
[4297399.609000] Stopping tasks: ================================|
[4297399.610000] Restarting tasks... done

How can I debug this further?


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