PS/2 Mouse does no longer work with kernel 2.6 on a laptop

[Emmeran Seehuber <rototor@rototor.de>]

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Hello everybody!

I'm trying to switch my laptop from kernel 2.4 to kernel 2.6.2. Everything 
seems to work correctly, only my PS/2 mouse doesn't.

My laptop has a touchpad and a PS/2 port. On the PS/2 port I usually attach a 
Logitech trackball. With kernel 2.4 I was able to use touchpad and trackball 
at the same time. With kernel 2.6 the trackball on the PS/2 port seems to be 
recognized, but it doesn`t work :( Neither in X11 nor with gpm on the console 
I get an input from the trackball, i.e. I can`t move the pointer nor click.

The kernel gives me the following information about the found input devices:

i8042.c: Detected active multiplexing controller, rev 1.1.
serio: i8042 AUX0 port at 0x60,0x64 irq 12
serio: i8042 AUX1 port at 0x60,0x64 irq 12
input: PS2++ Logitech Mouse on isa0060/serio2
serio: i8042 AUX2 port at 0x60,0x64 irq 12
serio: i8042 AUX3 port at 0x60,0x64 irq 12
input: PS/2 Generic Mouse on isa0060/serio4
serio: i8042 KBD port at 0x60,0x64 irq 1
input: AT Translated Set 2 keyboard on isa0060/serio0

Also in /dev/input exists these devices:

crw-r--r--    1 root     root      13,  63 1970-01-01 00:00 mice
crw-r--r--    1 root     root      13,  32 1970-01-01 00:00 mouse0
crw-r--r--    1 root     root      13,  33 1970-01-01 00:00 mouse1

Other non-PS/2 devices work, e.g. when I attach an USB mouse, that mouse 
works. 

What could be wrong with my configuration?

cu,
  Emmy
P.S.: Please CC me, since I'm not subscribed.

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00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0646 (rev 01)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP
00:02.0 ISA bridge: Silicon Integrated Systems [SiS]: Unknown device 0962 (rev 14)
00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016
00:02.3 FireWire (IEEE 1394): Silicon Integrated Systems [SiS] FireWire Controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
00:02.6 Modem: Silicon Integrated Systems [SiS] 56k Winmodem (Smart Link HAMR5600 compatible) (rev a0)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 PCI Audio Accelerator (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS]: Unknown device 7002
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C (rev 10)
00:0c.0 CardBus bridge: ENE Technology Inc: Unknown device 1410
01:00.0 VGA compatible controller: ATI Technologies Inc: Unknown device 4c66 (rev 01)

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