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Date: Thu, 14 Apr 2005 10:50:29 GMT
Message-Id: <200504141050.j3EAoTbb050078@freefall.freebsd.org>
To: freebsd-usb@FreeBSD.org
From: "Julien Gabel" <jpeg@thilelli.net>
Subject: Re: usb/74989: (regression) Lost USB support between 5.2.1-RELEASE 
 and 5.3-RELEASE on K7T266 Pro2.
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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: bug-followup@FreeBSD.org
Cc: freebsd-acpi@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: Thu, 14 Apr 2005 12:41:54 +0200 (CEST)

 Hello,
 
 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 meed 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)?
 
 -- 
 -jpeg.