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I have a Compaq Presario 1200 Series(12xl125, to be exact), with a Trident Cyberblade i7. The laptop monitor is "generic", as reported by Windows, Linux, and Compaq themselves. I have DPMS enabled in my xorg.conf, and the off time is set to 10 minutes.
HOWEVER: It has never turned off the monitor. The furthest it has gotten in terms of screensaving, is blanking, and it not turning off the monitor when it is supposed to is very annoying. I set the off time to 1 minute, and all it did was blank the screen! The backlight was still on, and this kills the battery more than I'd like it.
I will post my xorg.conf if I need to.
Last edited by Megatog615; 02-21-2006 at 03:39 AM.
You may need to set the screensaver config in your window manager. If you are using KDE or Gnome then there are settings for the screen saver that will either select power management for the monitor or not. You can start either configuration tool from the menus or from the command line in a virtual terminal. The configuration tool for KDE is called kcontrol. The configuration tool for Gnome is gnome-control-center.
You may also have to check to see if your distribution has a special daemon for laptop computers, or has a special configuration applet for the powesaved daemon. I don't know about the details for Ubuntu or Slackware. There may be files in /etc or in /etc/sysconfig to configure this utility.
Ubuntu comes with the Gnome software. It certainly would have the screen saver software. On the other hand you might consider switching from Slackware to Vector Linux. VL is based on Gentoo which is based on Slackware but the VL team has put in a lot of work to make it work with various software packages.
I just switched to Slackware so I could actually learn about the OS instead of having it "hold my hand" like in Ubuntu and various other distros. I've tried Vector, and didn't like it. Every time I tried installing that distro I got a kernel panic on the first bootup.
The error message indicated that you need the bc package. bc is a language that acts as a command line calculator. Install bc and try it again. You probably also still need the acpi software as well. That will provide a daemon that will try to throttle down your CPU and suspend to disk and all of that stuff.