Ok... thanks for helping me in this.
What I do is the following: (from instruction provided elsewhere in sabayon.org)
# emerge genkernel sabayon-sources
# eselect kernel list
# eselect kernel set x #to whatever I get in the list
# zcat /proc/config.gz > /usr/src/config
# genkernel --kernel-config=/usr/src/config --menuconfig --bootloader=grub --splash=sabayon --lvm all
When I get into the menuconfig there are no options for the battery not the AC adapter.
Insinde the /usr/src/config file there are no
they are missing...
I don't know if it has any impact on this but I should also mention that the installation i have has gone through a complete emerge --sync, emerge -uvD world and all the problems with that has been solved. Everything else works including compiz-fusion and the full KDE is reemerged. So I'm quite happy with it as it is. I have 4 boot possibilities in grub:
1 original sabayon 3.4f that works fine
2 the gentoo-kernel 2.6.23-r1 works but it is really slow so I have to take a look at the configuration
3 the sabayon-kernel 2.6.23-r1 works but the battery/ac adapter doesn't work
4 you don't wanna know but it is slooooow and ugly (XP)
Conclusion is that if I (and bill gates) keep our fingers away from the thing... it works!