Hi, I have a serial mouse, that works ok with 2.4, but in 2.6.0-test[12] don't work. The kernel does not recognize the serial port. root@djgera:~# cat /dev/ttyS0 cat: /dev/ttyS0: No such device I am sure that the configuration options that use are well, considering like main to these: CONFIG_INPUT_MOUSEDEV=y CONFIG_INPUT_MOUSE=y CONFIG_MOUSE_SERIAL=y CONFIG_SERIO=y CONFIG_SERIO_I8042=y CONFIG_SERIO_SERPORT=y CONFIG_INPUT_KEYBOARD=y CONFIG_KEYBOARD_ATKBD=y CONFIG_INPUT_MISC=y CONFIG_INPUT_PCSPKR=y Apparently kernel recognizes both serial ports, look this in this port i have connected mouse. ttyS0 root@djgera:~# cat /sys/bus/pnp/devices/00\:0a/* PNP0501 16550A-compatible COM port irq 3,4,5,7 High-Edge Dependent: 01 - Priority acceptable port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding Dependent: 02 - Priority acceptable port 0x2f8-0x2f8, align 0x0, size 0x8, 16-bit address decoding Dependent: 03 - Priority acceptable port 0x3e8-0x3e8, align 0x0, size 0x8, 16-bit address decoding Dependent: 04 - Priority acceptable port 0x2e8-0x2e8, align 0x0, size 0x8, 16-bit address decoding 0 state = active io 0x3f8-0x3ff irq 4 root@djgera:~# cat /proc/bus/input/devices I: Bus=0010 Vendor=001f Product=0001 Version=0100 N: Name="PC Speaker" P: Phys=isa0061/input0 H: Handlers=kbd B: EV=40001 B: SND=6 I: Bus=0011 Vendor=0001 Product=0002 Version=ab02 N: Name="AT Set 2 keyboard" P: Phys=isa0060/serio0/input0 H: Handlers=kbd B: EV=120003 B: KEY=4 2000000 c061f9 fbc9d621 efdfffdf ffefffff ffffffff fffffffe B: LED=7 no mouse information here. what is wrong? Oh! also activate DEBUG in drivers/input/serio/i8042.c and no debug messages appears when moving mouse. Thanks in Advance. attached the dmesg and config. -- Gerardo Exequiel Pozzi ( djgera ) http://www.vmlinuz.com.ar http://www.djgera.com.ar KeyID: 0x1B8C330D Key fingerprint = 0CAA D5D4 CD85 4434 A219 76ED 39AB 221B 1B8C 330D