usb/74989: (regression) Lost USB support between 5.2.1-RELEASE and 5.3-RELEASE on K7T266 Pro2.

[Julien Gabel]

The following reply was made to PR usb/74989; it has been noted by GNATS.

From: "Julien Gabel" <jpeg at thilelli.net>
To: "John Baldwin" <jhb at FreeBSD.org>
Cc: freebsd-acpi at freebsd.org, bug-followup at freebsd.org,
	freebsd-usb at 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.