On Sat, 14 Jul 2007, Akkana Peck wrote:

> I just noticed one weirdness, though: it lists ohci_irq_handler as
> one of the handlers. But this machine uses UCHI, not OHCI, and I
> configured my kernel accordingly.  But when I look at .config, I see:
> #
> # USB support
> #
> CONFIG_USB_ARCH_HAS_HCD=y
> CONFIG_USB_ARCH_HAS_OHCI=y
> CONFIG_USB_ARCH_HAS_EHCI=y
> 
> and then later I see what I configured,
> #
> # USB Host Controller Drivers
> #
> # CONFIG_USB_EHCI_HCD is not set
> # CONFIG_USB_ISP116X_HCD is not set
> # CONFIG_USB_OHCI_HCD is not set
> CONFIG_USB_UHCI_HCD=y
> # CONFIG_USB_SL811_HCD is not set
> 
> What are the "USB support" ones? I don't see them in menuconfig.

They indicate that your computer can support USB.  Some computers
can't.  For example, you could go out and buy a PCI card with an OHCI
controller; therefore your computer can support OHCI even though it
doesn't have OHCI at the moment.  These options don't appear in
menuconfig because they aren't something you can turn on and off;  
either your computer is capable of supporting USB or it isn't.

> Could that HAS_OHCI be causing the problem?

No.  The ohci-hcd driver won't be built unless CONFIG_USB_OHCI_HCD is 
set.

> Here's the dmesg output:
> 
> irq 9: nobody cared (try booting with the "irqpoll" option)
...
> handlers:
> [<c02c1e50>] (ohci_irq_handler+0x0/0x920)
> [<c02d2910>] (yenta_interrupt+0x0/0xe0)
> [<c02d8ab0>] (usb_hcd_irq+0x0/0x60)
> Disabling IRQ #9

You must have a copy of ohci-hcd left over from somewhere.  Perhaps you 
need to do clean rebuild and re-install.

Alan Stern


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