I've been testing Fedora Core 2 on my Centrino laptop, and it hotplugging USB devices doesn't appear to work with this kernel on this hardware.
If the USB devices are plugged in before booting, they are detected. When the USB device is unplugged, thats detected too, but plug-in in _after_ boot doesn't do a thing.
I know its not hardware since USB hotplug/unplug works on this laptop when I boot with RedHat 9.0
The Fedora-test mailing list hasn't been of help. :-(
lsusb shows that the device goes away, and /var/messages shows (upon removal following a cold-plug):
May 2 19:03:06 localhost udev[3572]: removing device node '/udev/sda1' May 2 19:03:06 localhost kernel: usb 2-1: USB disconnect, address 2 May 2 19:03:06 localhost udev[3615]: removing device node '/udev/sda'
But when I hot-plug a device in, I get nothing.
I've put debug statements in /sbin/hotplug and I know it doesn't get called, and I've turned on USB debug in the kernel config and it didn't generate any additional debug info other than what I've shown above.
Comments I find in drivers/usb/core/hub.c indicate that hub_irq() should be called when there's a status change, which I take to mean plug in and unplug. But a debug statement I threw in proves that it only gets there during powerup on coldplug or during hot-unplug, but not hot-plug.
Any leads to help debugging this issue would be appreciated. Even a high-level flow description might help.
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