Hello. I own a laptop and I have powernowd working correctly (as far as I know ) . However, in ubuntu linux and windows I would get over 3 hours of battery life while in arch I get 2 hours with 40 minutes. I believe this is due to the fact that ubuntu and windows slow down hdd speed and lower the brightness of the screen.
I do not care so much for the speed of the hdd, but the brightness of the lcd is something that should automatically adjust itself when I plug or unplug the ac adapter. I have searched the arch wiki and the forums and have not been able to find a way to do this.
can anyone help me ?
I believe it depends on your notebook. For instance.. i use sony_acpi and fsfn for my vaio notebook. More details would be helpful.
Yeah, It must depend on the notebook; my HP has a "plugged-in" mode and a "battery" mode, and remembers the screen brightness automatically. I don't think Linux even knows I'm messing with the screen brightness.
I believe that you can install the "laptop-mode-tools" package from pacman and you should be able to spin down your harddrive more often. I believe that this is what both Ubuntu and Windows do by default.
"Unix is basically a simple operating system, but you have to be a genius to understand the simplicity." (Dennis Ritchie)