I am running 2.4.22. I have a Microsoft USB Optical Intellimouse. In "make menuconfig" I enabled these options.

USB HID
-----------
SB Human Interface Device (full HID) support
HID input layer support
EHCI HCD (USB 2.0) support (EXPERIMENTAL)
UHCI (Intel PIIX4, VIA, ...) support


Core Interfaces
------------
Input core support
Mouse support
Event interface support

After running make bzimage I get this error:
----------------------snip----------------------->
drivers/usb/usbdrv.o(.text+0x124b5): In function `hidinput_hid_event':
: undefined reference to `input_event'
drivers/usb/usbdrv.o(.text+0x1252b): In function `hidinput_hid_event':
: undefined reference to `input_event'
drivers/usb/usbdrv.o(.text+0x1259f): In function `hidinput_hid_event':
: undefined reference to `input_event'
drivers/usb/usbdrv.o(.text+0x125eb): In function `hidinput_hid_event':
: undefined reference to `input_event'
drivers/usb/usbdrv.o(.text+0x1278a): In function `hidinput_connect':
: undefined reference to `input_register_device'
drivers/usb/usbdrv.o(.text+0x127dd): In function `hidinput_connect':
: undefined reference to `input_register_device'
drivers/usb/usbdrv.o(.text+0x12937): In function `hidinput_disconnect':
: undefined reference to `input_unregister_device'
drivers/usb/usbdrv.o(.text+0x124e1): In function `hidinput_hid_event':
: undefined reference to `input_event'
make: *** [vmlinux] Error 1
----------------------snip-------------------->


I read on a message board somewhere that there was an undocumented dependency so I turned on all the HID stuff and enabled all the input cores but still got the same error.

Also the kernel compiled without error until I added "HID input layer support". But the mouse wont work without it.

I had problems compiling my kernel when I tried to compile built-in HID support. If you're not all the input core stuff as modules already, you might want to try that. It made my mouse work...

I just re-compiled with the HID stuff as modules. Of course the kernel compiles without error now. I will have to wait until I get home however to see if my mouse works. Thanks for the help.