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Old 10-08-2003, 12:47 AM   #1
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Registered: Sep 2003
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Power Management not working

I'm looking for some ideas for getting my power management working. To get the monitor to shut off anyway. I don't really care about the suspend to RAM, auto shutdown, or hard-drive spin down stuff.

First off, I'm running RedHat 9, the Ximian 2 Desktop, and Linux kernel 2.4.22

I recompiled my kernel to include ACPI (short for "Advanced Configuration and Power Interface") support because I couldn't get APM to work and because I read that APM was being replaced by APCI. I downloaded the latest kernel patch for APCI from and patched my kernel with it.

I've checked my XF86Config file and it does include "DPMS" and "SyncOnGreen" in the Server Layout section.

When I run xscreensaver-demo, my Power Management options are available. (They are not greyed out.) Which according to the documentation means that the kernel knows I have ACPI.

My acpid deamon is set to start during bootup and I have verified that it is running.

So ... like ... why ain't it working?
Old 12-26-2004, 10:08 PM   #2
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Registered: Jul 2002
Location: Los Angeles, CA
Distribution: RH7.1
Posts: 29

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Hi Blixel,

I have the similar situation to you. I have RH9.0 with Ximian desktop and applied the acpi patch to the 2.4.20 kernel(the one from, not from the RH9.0), and recompiled the kernel with acpi stuffs as modules.

I am interested in how to make the screen shut off when not being used, and how to make the CPU goes to sleep when there is nothing to do.

Did you make it work? If you did, could you please make it known here, so that I can learn and apply?

My another question is, do I really need the ACPI or ACPID stuff for the desktop PC? Is that those that make the screen shut down and CPU go to sleep so that the CPU life span can be extended?

Could some expert answer my questions?

THank you very much.


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