On 2.4 kernels on Debian, there is a driver that enables better powersavings for AMD760MP and AMD-760MPX (usually found on multi-processors mainboards such as Tyan S2460, S2462 and S2469) chipsets: amd76x_pm. It also exists as patch for the 2.6 kernel, but as it is non-standard, it is not included in Debian kernels packages.
To use it, simply add the following line to the end of your /etc/modules
To load it without rebooting, simply type the following command as root
# modprobe amd76x_pm
Warning: Doing this on a Tyan S2469 running Debian Sarge with kernel 2.4.27-1-k7-smp will result in hanging the machine!
Use fgetty instead of getty on Debian
Getty is known to be memory-hungry. Let's replace it with something lighter, which works in most cases: fgetty On Debian Sarge and up, it is already packaged, so sudo apt-get install fgetty will do the trick. But this is not sufficent for it to be installed instead of getty.
You will have to edit /etc/inittab. Warning: this is a very dangerous file to edit, as it may render your system unbootable. You have been warned!
The following lines call getty
1:2345:respawn:/sbin/getty 38400 tty1
2:23:respawn:/sbin/getty 38400 tty2
Lets replace it with fgetty, which takes less arguments