~$ grep MOUSE /boot/config-2.6.16*
CONFIG_INPUT_MOUSEDEV=m
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=m
CONFIG_MOUSE_SERIAL=m
CONFIG_MOUSE_INPORT=m
# CONFIG_MOUSE_ATIXL is not set
CONFIG_MOUSE_LOGIBM=m
CONFIG_MOUSE_PC110PAD=m
CONFIG_MOUSE_VSXXXAA=m
CONFIG_USB_MOUSE=m
CONFIG_USB_IDMOUSE=m

=============

~$ lshal | grep mouse
  info.linux.driver = 'psmouse'  (string)
  info.capabilities = {'input', 'input.mouse'} (string list)
  info.product = 'IBM Enhanced (101/102-key, PS/2 mouse support)'  (string)
  pnp.description = 'IBM Enhanced (101/102-key, PS/2 mouse support)'  (string)

==============

~$ sudo discover
unknown unknown
unknown unknown
unknown unknown
unknown unknown
Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge
Intel Corp. 82371AB/EB/MB PIIX4 ISA
Intel Corp. 82371AB/EB/MB PIIX4 IDE
Intel Corp. 82371AB/EB/MB PIIX4 USB
Intel Corp. 82371AB/EB/MB PIIX4 ACPI
Ensoniq ES1371 [AudioPCI-97]
National Semiconductor Corporation DP83815 (MacPhyter) Ethernet Controller
3Com Corp, Modem Division (formerly US Robotics) WinModem
nVidia Corporation NV5 [RIVA TNT2/TNT2 Pro]
unknown unknown