Date: Fri, 15 Apr 2005 15:31:18 +0200 (CEST) From: "Julien Gabel" <jpeg@thilelli.net> To: "John Baldwin" <jhb@FreeBSD.org> Cc: bug-followup@freebsd.org Subject: Re: usb/74989: (regression) Lost USB support between 5.2.1-RELEASE and 5.3-RELEASE on K7T266 Pro2. Message-ID: <60391.192.168.1.18.1113571878.squirrel@webmail.thilelli.net> In-Reply-To: <200504150217.37985.jhb@FreeBSD.org> References: <49704.192.168.1.18.1113475314.squirrel@webmail.thilelli.net> <200504150217.37985.jhb@FreeBSD.org>
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>> 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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