[ltp] APMD and Standby on the TP-T21

[D. Sen]

Markus Alt wrote:

> "D. Sen" wrote:
> >
> > Markus,
> >
> > One last question. You said you go through one hibernate/resume cycle.
> > Could
> > you try a suspend (Fn+F4)/resume cycle and monitor your syslog for hda
> > messages?
> >
> > I ask because when I go through a suspend/resume cycle.....I get the
> > following
> > syslog messages:
> >
> > Mar  4 06:00:19 localhost kernel: hda: timeout waiting for DMA
> > Mar  4 06:00:19 localhost kernel: hda: irq timeout: status=0x50 {
> > DriveReady
> > SeekComplete }
>
> Sorry for not responding earlier. No, I don't see any of these messages,
> regardless whether I do a system suspend via <Fn><F4> or a user suspend
> via "apm --suspend".
>
> > Unless that is, I disable dma using hdparm just before suspend (from the
> > apmd
> > script). I re-enable dma after the resume.
>
> I remember you mentioned that your HD parameters differ from mine in
> that you have 32 bit support enabled and also unmask IRQ set to 1. Could
> the latter be responsible for your those "hda: lost interrupt" messages
> you're seeing in syslog? Is it the same behaviour if you set "unmaskirq
> = 0"? Just an idea ...
>

I tried that out (setting 32 bit support and umasqirq =0) without any
success.

> With regard to the BIOS version: I have been using version 1.02a
> (KZET18WW) so far. I must admit that I haven't seen that there's a new
> version out since midth of January. After upgrading to the latter
> (1.04/KZET22WW), the behaviour is still the same, so I don't think that
> the BIOS version matters in that case.
>

Yes, the only remaining difference between your machine and mine is the
kernel version. I should compile a 2.2.x kernel and see what happens.

Thanks,
DS

>
> Markus
>
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--
D. Sen, Room E167
AT&T Labs-Research
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