APM stability

**whiteskin** · 02-15-2004

It seems that 1/25 times i go down with apm, my system locks up when it comes back up. Anyone else ever seen this behavior? Is it a problem with my setup, or just a a problem iwth the apm standard?

I do need apm, this machine being a laptop of course.

**Giro** · 02-16-2004

How old is the laptop? If it isnt that old your should really use ACPI what distro are you using?

**mesut** · 02-16-2004

is it necessary to enable acpi/apm in order to use powernow ?

**Giro** · 02-16-2004

IIRC Powernow is AMD's Speedstep you should not use both APM and ACPI use one or the other. No you do not need ACPI just the options below.

Code:

CPU Frequency scaling  ---> 
&#91;*&#93; CPU Frequency scaling
&#91;*&#93;   CPU frequency table helpers &#40;NEW&#41;
&#91;*&#93; AMD Mobile Athlon/Duron PowerNow!

I also use speedfeq to control my proccessor's frequency you can set it to dynamic so you have the juice when needed

**whiteskin** · 03-23-2004

Question: Is there a conclusive list that can tell me if my laptop has ACPI. I have wondered for a while, but dell is no help in that respect (At least their tech specs page).

I seem to remember seeing it on a forum at one point, but... not quite sure.

I suppose i could take the time and just recompile to figure it out. But i prefer to research first.

**Mikey** · 03-23-2004

I am running Fedora on my Dell Inspiron 2500 and using acpi=on in my kernel arguement works fine. What I did was copied the lines in grub.conf so that I had two versions of the Fedora boot part. Then I put the acpi=on on one, but not the other so that if it didn't work, I could choose the other. Obviously I could also just edit what's sent to the kernel but it is easier the other way.

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