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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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