don't give up ... that's what I did until I retried it yesterday and it simply rocks ...
start with getting the latest patch for ACPI from
http://acpi.sourceforge.net
also get the latest daemon from
http://acpid.sourceforge.net
install the daemon, and patch the kernel with the acpi patch like this:
cp acpi-patch /usr/src/yourkernelsource
cd /usr/src/yourkernelsource
patch -p1 < acpi-patch
make mrproper
make menuconfig
(load an old configuration file if you kept one, that's always advisable)
go to the General Setup menu
all the way on the bottom of that one you see Power Management. Make sure you say N to APM and Y on all the ACPI ones you want. Note that some of those features may not work as of yet on your system. ACPI is for some reason still experimental. anyway, say
Y and not M.
make some other adaptions if you want
save the configuration to a separate file (Save to Alternate File or something, at the bottom) and then exit and save
make dep
make clean
make bzImage
make install
make modules
make modules_install
reboot
And that worked for me (I made too much adaptions the first time I recompiled for acpi, so it wouldn't boot ... best idea seems to just compile ACPI in and if it works you have a winning combination and you can start adapting more and more
at least that's how I did it and how I feel about it. But don't give up, I'm sure that if I can do it, anyone can(given the hardware works with ACPI of course

)
EDIT: by the way, I use GKrellm to monitor my battery, it's ok, but if someone could name something better than that, I'd be happy to try it
