sony-vaio-z-series team mailing list archive

[Joël Bourquard <joel.bourquard@xxxxxxxxx>]

After many attempts, it turns out the "pm-utils" package contained two
"hooks" that caused the ATA errors. To resolve this, the following files
must be added:

/etc/pm/power.d/harddrive
/etc/pm/power.d/sata_alpm

Once these two placeholder files are added, they automatically override the
corresponding two bundled hooks, and pm-utils will not cause ATA bus errors
anymore. I feel safer now :-)

This is on Gentoo Linux with pm-utils 1.4.1, by the way.



On Mon, Nov 29, 2010 at 11:30 PM, vick <weasalandme@xxxxxxxxx> wrote:

> >I have heard of similar issues if we switch
> /sys/class/scsi_host/*/link_power_management_policy  between min_power and
> max_performance, but I'm not doing that.
>
> >Is the DSDT doing something behind our back, when we plug/unplug AC power
> ?
>
> You might not be doing it manually but there are power management services
> (at least in KDE) that change to min_power when you unplug the AC adapter, I
> would check if you have one of those and try setting the power profile not
> to switch to min_power.
>
>
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