Re: usb devices do not appear in dmesg in FC4

On Mon, 30 Jan 2006 19:29:32 GMT, John McFee staggered into the Black
Sun and said:

> Dances With Crows wrote:
>> On Mon, 30 Jan 2006 05:29:56 GMT, John McFee staggered into the Black
>> Sun and said:
>>>If I run Windows XP, my usb ports (I have 3 front, 2 back) all work
>>>fine and my usb printer does too. When I run Fedora, none of the USB
>>>devices are recognized.
>> Try modprobing usbcore. If that doesn't work, do "/sbin/lspci -vv |
>> grep -A6 HCI" and see what you get from that.
>>
>> 00:07.2 USB Controller: FOOBAR Corporation 1234/56 USB (rev 01)
>> (prog-if 00 [OHCI])
>> Interrupt: pin D routed to IRQ 19
>>
>> ...if the Interrupt says "pin X routed to IRQ 0" then there's a
>> problem. Fiddle with the BIOS settings (change the "OS Installed"
>> from "non-PNP" to "PNP" or vice versa) to fix that.
> You hit the nail right on the head. I had used lspci before but not
> with the vv option. When I did, for each of the USB and Firewire
> controllers, the pins were routed to IRQ 0. I made the PNP change in
> the BIOS and everything works now. I never would havve figured that
> out in a long time.

This problem (or one very like it) has plagued Linux users for years
now. Years ago, you had to set the BIOS to "non-PNP" for everything to
work properly. Now, the kernel's fully PNP-aware for PCI devices, so
you should set it to "PNP" first. So I advise people to flip the
setting from whatever it is to the other one when they run into the "IRQ
0" problem. Glad that it helped,

--
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
Brainbench MVP for Linux Admin / mail: TRAP + SPAN don't belong
http://www.brainbench.com / "He is a rhythmic movement of the
-----------------------------/ penguins, is Tux." --MegaHAL
.

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