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SubjectRe: broken suspend in .2.6.25-rc3 on T61p (was Re: new regression in 2.6.25-rc3: no keyboard/lid acpi events on thinkpad T61p)
On Tue, Feb 26, 2008 at 10:56:41PM +0100, Pavel Machek wrote:

> Seems like pm-utils is just a thin wrapper around s2ram, at least in
> version debian ships. It does not seem to have its own whitelist.

The actual whitelists still live in hal (or specifically hal-data),
rather than pm-utils. /usr/share/hal/fdi/information/10freedesktop/20-video-quirk-pm-*
for example. This gets passed down to pm-utils by hal.

> /usr/lib/pm-utils/functions
>
> ...
>
> if [ -x /usr/sbin/s2ram ]; then
> if [ -n "$S2RAM_OPTS" ]; then
> # Trust HAL or the user to pass the correct
> options
> /usr/sbin/s2ram $S2RAM_OPTS
> elif /usr/sbin/s2ram --test > /dev/null ; then
> # Trust s2ram's internal whitelist
> /usr/sbin/s2ram
> else
> # Unknown machine
> echo "This machine is unkown, please try to
> find out how to suspend this machine. See s2ram(8)."
> fi
> else
> echo -n "mem" > /sys/power/state
> fi

Seems to be a debian specific change, the variant in Fedora, nor upstream
pm-utils doesn't have any of that. Possibly because it's a dumb idea
to have two separate sources of the same information.

> ...so it is ready to use s2ram, but will fall back to
> echo. Unfortunately, that will mean no video resume on _many_
> machines.
>
> To give some numbers: according to s2ram whitelist, we can restore
> video on 410 machines. On 74 of them, s2ram is not needed. So
> approximately 80% of machines need s2ram (at least in configuration
> without X running)....
>
> Pretty please, can we get s2ram for Fedora, so that video is restored
> there?

I'm not the gatekeeper of what goes into Fedora userspace, but I'm pretty
certain the path forward has already been decided. Running a modern
Fedora desktop installation without hal just isn't feasible.

Dave

--
http://www.codemonkey.org.uk


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