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SubjectRe: [linux-usb] 2.3.51 apm and usb uhci
On Fri, 17 Mar 2000, Johannes Erdfelt wrote:

> Does it go up at all? Interrupt make the processor do things. Also,
> have you checked your BIOS for the power saving settings and USB's
> IRQ?

The BIOS doesn't have specific setting for power in regards to USB. I'm
not sure what you mean. In general, the BIOS is set to spin down the disk
after 5 min, reduce the clock speed automatically, etc.

What IRQ should USB be using? Since it is on the PCI bus, shouldn't it use
IRQ 9 (shared)?

Here is a what the interrupts look like. There isn't any big difference
when I insert the usb-uhci module:

[root@tool /root]# while : ; do cat /proc/interrupts|grep eth0; sleep 2
; done;
9: 1947639 XT-PIC Ricoh Co Ltd RL5c475, eth0
9: 1947640 XT-PIC Ricoh Co Ltd RL5c475, eth0
9: 1947641 XT-PIC Ricoh Co Ltd RL5c475, eth0
9: 1947642 XT-PIC Ricoh Co Ltd RL5c475, eth0
9: 1947647 XT-PIC Ricoh Co Ltd RL5c475, eth0
9: 1947647 XT-PIC Ricoh Co Ltd RL5c475, eth0, usb-uhci
9: 1947648 XT-PIC Ricoh Co Ltd RL5c475, eth0, usb-uhci
9: 1947649 XT-PIC Ricoh Co Ltd RL5c475, eth0, usb-uhci
9: 1947650 XT-PIC Ricoh Co Ltd RL5c475, eth0, usb-uhci
9: 1947651 XT-PIC Ricoh Co Ltd RL5c475, eth0, usb-uhci
9: 1947652 XT-PIC Ricoh Co Ltd RL5c475, eth0, usb-uhci


- brett










> > > Also, try using usb-uhci to see if it's a driver issue.
> >
> > Same problem.
> >
> > Any other ideas?
>
> The virtual root hub periodically polls the root hub ports to find
> connect changes.
>
> Perhaps that is confusing the power management software?
>
> I don't see how that could, but the timer interrupt doesn't.
>
> JE
>
>


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