I too have a VAIO E series laptop.

 xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Macintosh mouse button emulation          id=12   [slave  pointer  (2)]
⎜   ↳ ImPS/2 Generic Wheel Mouse                id=11   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Video Bus                                 id=6    [slave  keyboard (3)]
    ↳ Sony Vaio Keys                            id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ USB 2.0 Camera                            id=9    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=10   [slave  keyboard (3)]

/proc/bus/input/devices has:

I: Bus=0011 Vendor=0002 Product=0005 Version=0000
N: Name="ImPS/2 Generic Wheel Mouse"
P: Phys=isa0060/serio2/input0
S: Sysfs=/devices/platform/i8042/serio2/input/input7
U: Uniq=
H: Handlers=mouse2 event7 
B: EV=7
B: KEY=70000 0 0 0 0
B: REL=103

I'm on Lucid amd64 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 08:03:28
UTC 2010 x86_64 GNU/Linux.

Hope this gets fixed soon. This laptop is 3-4 months old and this
problem is still bugging me :)

Sound used to be a problem too, but manually compiling latest alsa
1.0.23 fixed it.

-- 
Alps touchpad detected as ImPS/2 Generic Wheel Mouse(in VAIO E series) after 
the kernel upgrade
https://bugs.launchpad.net/bugs/565543
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