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    Subject2.6.27-rc5-mmotm0829 - CONFIG_HID_COMPAT causes hangs at boot
    I built a rc5-mmotm kernel, and set CONFIG_HID_COMPAT=y, but then found
    that I didn't actually *need* any of quirks files that tries to load, so
    those all got set to 'n'.

    The resulting kernel would get this far (using a HID_COMPAT=n kernel's dmesg
    and annotating, I couldn't get netconsole) and then hang while still running
    off the initrd:

    [ 1.665167] usb 1-8: New USB device found, idVendor=413c, idProduct=0058
    [ 1.678083] usb 1-8: New USB device strings: Mfr=0, Product=0, SerialNumber=0
    [ 1.753101] usb 1-8.1: new low speed USB device using ehci_hcd and address 5
    [ 1.842008] usb 1-8.1: configuration #1 chosen from 1 choice
    [ 1.869343] usb 1-8.1: New USB device found, idVendor=045e, idProduct=0023
    [ 1.882267] usb 1-8.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [ 1.895189] usb 1-8.1: Product: Microsoft Trackball Optical®
    [ 1.908056] usb 1-8.1: Manufacturer: Microsoft

    (the next line would make it to the console)

    [ 1.926685] input: Microsoft Microsoft Trackball Optical® as /devices/pci000:00/0000:00:1d.7/usb1/1-8/1-8.1/1-8.1:1.0/input/input1
    [ 1.945217] generic-usb 0003:045E:0023.0001: input,hidraw0: USB HID v1.00 Mouse [Microsoft Microsoft Trackball Optical®] on usb-0000:00:1d.7-8.1/input0
    [ 1.959193] usbcore: registered new interface driver usbhid
    [ 1.973037] usbhid: v2.6:USB HID core driver

    (the following line would not)
    [ 1.987014] Advanced Linux Sound Architecture Driver Version 1.0.18rc1.

    Poking around with sysrq-T would show a modprobe process running and not
    making any progress, just hung waiting for something. I can go get the
    traceback if needed.

    This ring any bells?
    [unhandled content-type:application/pgp-signature]
     \ /
      Last update: 2008-09-01 11:43    [W:0.020 / U:63.056 seconds]
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