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

[Julien Gabel]

>> 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.