acpi=off disables Fn key combinations on ThinkPad

[Chris Leith]

I played with ACPI suspend to ram on my T40 with the newer kernels (541
and 584). Actually seems to suspend, provided you stop usb first. I read
that the battery performance under ACPI suspend is very poor right now
though, so it is not a desirable option. I really want to get APM
suspend working again, since it worked perfectly before.

I think the problem with APM suspend is tied to the fact that the Fn key
presses don't seem to be registered properly with the newer kernels (541
and 584) when under APM (ie. acpi=off). The Fn key always "worked"
before for me. I, too, am able to suspend my machine by issuing apm -s
directly (when using acpi=off), however, I am not convinced that the
machine is even attempting to resume since the suspend led (the little
moon) stays lit. Rather, I think the machine is just ignoring the
required key press (Fn key on my T40) that normally tells it to resume.

-Chris




On Wed, 2004-22-09 at 19:32 -0500, Satish Balay wrote:
> On Wed, 22 Sep 2004, Chris Leith wrote:
> 
> > Configuration: FC3T2 with kernel 2.6.8-1.584
> > 
> > Using acpi=off in the kernel command line (to disable acpi and use
apm
> > instead) causes the Fn key (and any combinations) on my ThinkPad T41
to
> > not respond. Even things like tpb package (can be used in
conjunction
> > with xosd to show an on screen volume level, for example) no longer
work
> > when acpi=off is used. Without acpi=off tpb works fine and some of
the
> > Fn key combinations are registered. I prefer to use apm, however.
> > Previously, using acpi=off worked flawlessly (suspend to ram using
apm,
> > all Fn key combos working) with a 2.6.6 kernel in FC2.
> > 
> > Can anyone shed some light on this change in behaviour?
> 
> ACPI suspend works fine for you? It doesn't on my T40. (with both 541
> & 584 kernels)
> 
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=133105
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=133176
> 
> Satish
> 
>