Messages in this thread |  | | | Date | 18 Jun 2005 21:09:21 +0200 | | Date | Sat, 18 Jun 2005 21:09:21 +0200 | | From | Andi Kleen <> | | Subject | Re: [2.6.12] x86-64 IO-APIC + timer doesn't work |
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On Sat, Jun 18, 2005 at 02:52:52PM +0100, Alistair John Strachan wrote: > Hi, > > I upgraded my nForce3 x86-64 desktop from 2.6.12-rc5 to 2.6.12 today and > something strange started happening. Waay back in 2.6.x I had problems with > the "noapic" default for nForce boards on x86-64, and so used the "apic" > kernel boot parameter to force the apic on; this worked successfully for a > long time with no timer problems.
apic hasn't been needed for several kernel releases now, since the timer override problem on the Nforce has been workarounded.
> > However, as of 2.6.12 (maybe -rc6, too?) my desktop occasionally fails to boot > with the message: > > "IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter." > (arch/x86_64/kernel/io_apic.c) > > However, this message is intermittent; it is sometimes possible to boot > without getting it, and everything works fine. So I took its advice and ran > with noapic, and everything seems fine now. > > However, I just thought I'd let whoever maintains this bit of code know that > the check isn't a "sure thing": it's not being flagged reliably. Whether this > is my BIOS or the kernel, I don't know. > > Though I clearly don't require this functionality any more, is there any > reason I now can't use apic on this nForce3 board, where previously (on > 2.6.12-rc5 and older) I could?
Are you sure the problem is new?
Can you post the full output of a failing case with apic=verbose?
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