Can't sleep on a G4 Powerbook

[Scott J. Henson]

Peter Stoddard wrote:

>I am having a problem putting my Mac 12" Powerbook to sleep with Breezy
>like it did with Mac OSX.  To me, sleep means I the hard disk and the
>display are no longer active.  I have read a few posts about this, and
>am trying to understand it, but am not having much success.  I don't
>know where to begin, so here is some stuff I have done, and discovered.
>Any comments would be welcomed.
>
>  
>
Apple systems don't have apm or acpi like x86 machines.  The apple
powerpc systems have a pmu.  This is generally best controled by
pbbuttonsd.  It knows how to manipulate your nice apple hardware and get
it to do all kinds of cool things.  You may also want to install
gtkpbbuttons. 

Now, having said that, pbbuttonsd and gtkpbbuttons were probably both
installed on your system by ubuntu-desktop and the installer.  These may
have been uninstalled when you were installing sleepd or other stuff, so
you might have to reinstall it.  But, even with pbbuttonsd installed and
running you may not be able to sleep.  Last I checked, PowerBooks with
nvidia graphics cards could not sleep.  I'm not entirely sure if this is
true or not, but you may want to check it out.  Also, you may want to
ensure that your /etc/yaboot.conf does not enable ofvideo.  You can
check for that in /proc/cmdline.  If that contains video=ofonly then you
have no chance of sleeping.  Remove that line from your yaboot.conf and
rerun ybin.  Then reboot.  If that doesn't get your lappy to sleep, then
your probably out of luck.  Not sure though, I haven't checked this out
in a while(a year?).