VIA IO-APIC/ACPI Success - Was: Fixing USB interrupt problems with ACPI enabled [Christian.Guggenberger@physik.uni-regensburg.de]

From: Christian Guggenberger (Christian.Guggenberger_at_physik.uni-regensburg.de)
Date: 08/31/03

  • Next message: Petr Baudis: "Re: Re: Re: Re: IDE DMA breakage w/ 2.4.21+ and 2.6.0-test4(-mm4)" 
    Date:	Sun, 31 Aug 2003 23:47:01 +0200
To: linux-kernel@vger.kernel.org, jun.nakajima@intel.com

    > Doing this for Len, who is on vacation. We would like to thank the
    > people who provided debugging info such as acpidmp, dmidecode, and
    > demsg. This is one of our findings, and we believe this would fix some
    > interrupt problems (with USB, for example) with ACPI enabled, especially
    > when the dmesg reads like:
    >
    > ACPI: PCI Interrupt Link [ALKA] enabled at IRQ 0
    > ACPI: PCI Interrupt Link [ALKB] enabled at IRQ 0
    > ACPI: PCI Interrupt Link [ALKC] enabled at IRQ 0
    > ACPI: PCI Interrupt Link [ALKD] enabled at IRQ 0
    >
    > Basically we assumed that _CRS returned the one we set with _SRS, when
    > setting up a PCI interrupt link device, but that's not the case with
    > some AML codes. Some of them always return 0.
    > Attached is a patch against 2.4.23-pre1. It should be easy to apply this
    > to 2.6.

    Amazing! This patch also fixes IO-APIC problems on my EPOX 8k5a3+ (VIA KT333).
    Onboard devices like usb, sound and net (via-rhine) never worked, when the
    mobo operated in APIC mode - now they do, great!
    There's also a patch for 2.6 on bugzilla - see Bug #10.
    So, if everyone with ACPI/IO-APIC probs with via chipsets would test this one,
    it hopefully would make it into mainstream 2.4 / 2.6 soon.

    Thanks!
    Christian

    P.S. original message:
    http://marc.theaimsgroup.com/?l=linux-kernel&m=106225872121774&w=2
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  • Next message: Petr Baudis: "Re: Re: Re: Re: IDE DMA breakage w/ 2.4.21+ and 2.6.0-test4(-mm4)"

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