Re: [gpm] gnome-power-manger-2.26.0 suspend and hibernate

[Chris Vine <chris cvine freeserve co uk>]

On Mon, 23 Mar 2009 21:07:33 -0500
Victor Lowther <victor lowther gmail com> wrote:
> Hi, pm-utils maintainer here.  What version of pm-utils are you using?

Hi there.

I am using pm-utils-1.2.3.  It happens to come with my distribution
although I have no particular objection to upgrading it to a later
version if you think it might help.  (However I have now moved
pm-hibernate and pm-suspend and substituted my own scripts which fixes
the problem for me.)

> If you need to unload modules across a suspend/resume or
> hibernate/thaw, you can have pm-utils unload them using the
> SUSPEND_MODULES parameter -- just drop a file in /etc/pm/config.d
> with the line SUSPEND_MODULES="problematic modules", and pm-utils
> will unload and reload them across suspend/hibernate.  Which modules
> are you having to unload to make things work?

rt73usb and some related rt2x00/mac80211 modules.

Automatic module reloading is a useful feature but slightly problematic
in this case.  There is a trickiness about reinstalling the wireless
modules automatically as this triggers a new udev insert event which
will cause the wireless interface to come back up, whilst wicd (my
wireless management client) also has its own pm-utils resume handler. I
therefore do it by hand in a way which doesn't worry wicd too much.
 
> Also, what is the HIBERNATE_MODE environment variable?

It is unset, so the raw kernel interface should be invoked.  The raw
kernel interface works fine with my laptop, provided I unload the
wireless modules first.

> Hmmm... among other things, pm-utils is intended to be an abstraction 
> layer that higher-level code can call without having to worry about 
> whatever bizzare workarounds any given machine requires to sleep and 
> wake back up.

99% coverage (or whatever you have) is great, but unfortunately I seem
to fall within the residual 1%.

As it happens, pm-suspend does work correctly, and the problem is with
pm-hibernate.  Nothing gets logged but what I think happens is that
pm-utils thinks that thawing hasn't completed so it blocks any further
attempts at hibernation.

Chris