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Old 02-22-2005, 11:43 AM   #1
Registered: Aug 2003
Location: Rochester, MN, U.S.A
Distribution: Gentoo
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noapic option, configuration?

I have been struggling(on and off) with debian for a long time, I ususally get stuck with making my network connection work, DHCP always fails. I got it working today, I needed to boot it with the kernel option "noapic". So I am guessing that must use a kernel that has certain features(apic) not enabled. Do you know what specific options are disabled using that boot parameter? I know I have had apic enabled in other kernels I have used on that computer in the past with no bad effects.

to some up my question: what makes the "noapic" kernel different?
Old 02-23-2005, 04:35 AM   #2
Registered: Jul 2003
Location: Brighton, Michigan, USA
Distribution: Lots of distros in the past, now Linux Mint
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Just a guess (that will annoy debian fans) debian is way behind the curve because of petty "free" battles (unless you offer your first-born along with your software, it might take a while to be adopted into the debian world, and god help you if you accept donations or other monies for your efforts, you get the idea). So, apic, while it isn't tops for any distro, Debian's policies (a "security" arrogance/ignorance) mean that their distro will take a few years before they get around to a reasonable apic usage.

In other words, if you want to use Linux, and don't have overarching hangups, just about any other distro is going to be a better choice. Sad thing is, it wasn't that long ago that the debian folks were setting the pace, and supporting debian was a no-brainer, because their proof was in their pudding.

As an alternative, you might use the apm options for power managment.

Last edited by scott_R; 02-23-2005 at 04:36 AM.
Old 02-23-2005, 03:32 PM   #3
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Registered: Jun 2004
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apart from the strange rant about debian
your motherboard has or doesn't have an apic controller that can be turned on or off in BIOS
it consists of three parts - a local APIC, an I/O APIC and an APIC bus.
it stands for
Advanced Programmable Interrupt Controller
apic is an intel cpu specification that uses writable cpu registers to distribute interupt handeling evenly accross multiple cpus by collecting the interupt signals from i/o devices and redirects these signals to local cpu specific APIC handlers via the APIC-bus

this is done entirely by the kernel and has nothing to do with "distro"
one would assume this has to do with what is supported by your motherboard and your BIOS settings


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