Date: Fri, 15 Apr 2005 13:40:25 GMT From: "Julien Gabel" <jpeg@thilelli.net> To: freebsd-usb@FreeBSD.org Subject: Re: usb/74989: (regression) Lost USB support between 5.2.1-RELEASE and 5.3-RELEASE on K7T266 Pro2. Message-ID: <200504151340.j3FDePDl089935@freefall.freebsd.org>
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The following reply was made to PR usb/74989; it has been noted by GNATS.
From: "Julien Gabel" <jpeg@thilelli.net>
To: "John Baldwin" <jhb@FreeBSD.org>
Cc: freebsd-acpi@freebsd.org, bug-followup@freebsd.org,
freebsd-usb@freebsd.org
Subject: Re: usb/74989: (regression) Lost USB support between 5.2.1-RELEASE
and 5.3-RELEASE on K7T266 Pro2.
Date: Fri, 15 Apr 2005 15:31:18 +0200 (CEST)
>> I made some progress here. After playing with BIOS settings, i am now
>> able to:
>> - Boot with ACPI enable (shutdown -p works as expected now);
>> - Use USB devices.
>>
>> In order to do that, i had to totally disable "APIC Function" in the
>> BIOS. With "APIC Function" enabled, neither version 1.4 nor 1.1 of the
>> "MPS Table Version" settings solved my problem.
>>
>> So, although i need to disable "APIC Function", all seems to works
>> correctly together: ACPI support and USB support. As a side note, i
>> did not encountered anymore the interrupt storm on the uhci USB host
>> controller driver.
>>
>> Maybe can someone explain me what may be wrong with "APIC Function",
>> and if there is some drawbacks to disable it (or what is the purpose
>> of this setting)?
> APIC is used to route interrupts differently. You can also disable it
> from the loader with 'hint.apic.0.disabled=1'. I've looked at your
> dmesg's, and the problem is that in the ACPI case the IRQ 10 that your
> USB controllers are using is configured as an ISA IRQ (edge/high). For
> now you can either disable APIC or ACPI as a workaround until I figure
> out a better solution.
Thanks. I effectively prefer turn APIC off via the loader configuration
than from the BIOS settings, i think it is far more easily to remember
what i have done from this place.
I can try patch(es) or make test(s) without problem on this machine, if
any. Thanks a lot.
--
-jpeg.
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