From: Mikael Pettersson <mikpe@csd.uu.se>
To: R.E.Wolff@BitWizard.nl
Cc: linux-kernel@vger.kernel.org
Subject: Re: APIC and "ISA" interrupts.
Date: Thu, 25 Oct 2001 12:20:58 +0200 (MET DST) [thread overview]
Message-ID: <200110251020.MAA13431@harpo.it.uu.se> (raw)
On Wed, 24 Oct 2001 23:32:45 +0200 (MEST), Rogier Wolff wrote:
>After upgrading our fileserver to 2.4, I can't seem to get the ISDN
>card to work. I think that's because the kernel is using the APIC to
>route interrupts, such that my BIOS configuration "used-by-Legacy-ISA"
>is no longer in effect.
>
>I tried disabling the APIC with the following results:
>
>Local APIC disabled by BIOS -- reenabling.
>Found and enabled local APIC!
>Kernel command line: auto BOOT_IMAGE=linux ro root=302 BOOT_FILE=/boot/vmlinuz disableapic
>
>as far as I can see, the code to print "local apci disabled by bios"
>is not called if "disableapic" is on the commandline.
>
>This is linux-2.4.10 that I got with SuSE 7.3
"disableapic" is not in 2.4.13 vanilla. Some SuSE hack?
Anyway, try "noapic" instead. That should disable the kernel's use of
the IO-APIC. The local APIC is a completely different beast, and it is
unlikely to have anything to do with your interrupt routing problems.
Failing that, recompile with CONFIG_X86_UP_IOAPIC=n and CONFIG_SMP=n.
/Mikael
(. local APIC on UP caretaker .)
next reply other threads:[~2001-10-25 10:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-25 10:20 Mikael Pettersson [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-24 21:32 Rogier Wolff
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