[PATCH 1/1] [Maverick] Enable CONFIG_PCIEASPM=y

[Chase Douglas]

On Wed, 2010-05-26 at 12:40 +0100, Andy Whitcroft wrote:
> On Sun, May 23, 2010 at 10:42:27PM -0700, Leann Ogasawara wrote:
> > >From 5b00f35635007a49bff3ff0f9ae1cb6b752f1a86 Mon Sep 17 00:00:00 2001
> > From: Leann Ogasawara <leann.ogasawara at canonical.com>
> > Date: Sun, 23 May 2010 13:44:37 -0700
> > Subject: [PATCH] UBUNTU: [Config] Enable CONFIG_PCIEASPM=y
> > 
> > BugLink: http://bugs.launchpad.net/bugs/333990
> > 
> > Enable CONFIG_PCIEASPM=y for ports and ubuntu.  This option enables PCI
> > Express ASPM (Active State Power Management) and Clock Power Management.
> > Users have confirmed powersaving after having enabled this option.
> > 
> > Signed-off-by: Leann Ogasawara <leann.ogasawara at canonical.com>
> 
> I wonder if this is something we should consider for Lucid as well as
> that has a long shelf life in the data centre where such savings may
> be relevant.

It also seems you have to enable it by:

echo "powersave" > /sys/module/pcie_aspm/parameters/policy

Without having looked at the source, hopefully this means we could flip
the config and nothing changes by default. People who want to try it out
can enable it themselves.

I'll be looking into adding this to pm-utils-powersave-policy for
maverick.

-- Chase