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APIC is required I believe for SMP machines (2 or more cores or CPUs).
I generally run with it enabled as I have SMP (dual core) machines here.
~ I also use frequency scaling on the laptop so acpi is on for me by
default. When recording though I do lock the CPU frequency via the KDE
power applet (I run KDE on the laptop).
Generally there should be no need for anything other than the default
kernel options unless you are troubleshooting something. I used to use
those options on my laptop before the linux kernel had better support
for my laptop. A couple of bios upgrades helped as well, but this is
kinda OT now
Ralf Mardorf wrote:
| Pablo Fernandez wrote:
|> On Wed, May 14, 2008 at 8:26 PM, Ralf Mardorf
|> <email@example.com <mailto:firstname.lastname@example.org>> wrote:
|> Pablo Fernandez wrote:
|> > I have noapic, nolapic and acpi=off at boot.
|> I wouldn't turn acpi off. Ok, anyhow power should be turned of
|> and not only by the acpi function but maybe also the fan speed is
|> controlled by acpi and other needful things.
|> I wasn't sure anyway. I'll remove that option. Thanx for the tip.
| Hi Pablo
| I'm not sure if I'm right
. I read about that if acpi is on, the
| performance will slow down but I never noticed that. Maybe it is better
| with slow CPUs to turn acpi off. I also don't know if things like the
| fan speed are controlled by acpi. If it will be controlled by acpi and
| acpi will be turned of, the fan always would run full speed. To turn
| acpi of won't damage anything.
| I just think it's better to turn acpi on.
| My 64 Studio will be booted with acpi on:
| title 64 Studio, kernel 2.6.21-1-multimedia-amd64
| root (hd0,13)
| kernel /boot/vmlinuz-2.6.21-1-multimedia-amd64 root=/dev/hda14 ro
| vga=791 splash=silent
| initrd /boot/initrd.img-2.6.21-1-multimedia-amd64
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