Synaptics touchpad stopped working. Ubuntu 12.04. Acer Aspire 4749

My Synaptics touchpad stopped workig randomly (maybe after updating software). A usb ouse still works fine. Switching to a guest user doesn't help and neither did lockking and unlocking te touchpad with Fn+F7.

I'm still quite new to Ubuntu and have tried out some solutions suggested in reply to similar questions eg. echo "options psmouse proto=imps"|sudo tee /etc/modprobe.d/mousefix.conf>/dev/null and rebooting but this didn't work.

I also tried installing an accesory "Touchpad-Indicator" thinking it miht help to see what the problem was, and when I realised it wasn´ t really of any use tried uninstalling it with sudo apt-get autoremove. After removing this accesory Fn+F7 doesn't seem to turn the touchpad on anymore, but this isn't the originnal problem.

Thanks a lot
Mik

re-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise

Linux -Aspire-4749 3.2.0-33-generic #52-Ubuntu SMP Thu Oct 18 16:29:15 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

[ 1.043507] mousedev: PS/2 mouse device common for all mice
[ 2.157732] input: USB OPTICAL MOUSE as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input5
[ 2.157831] generic-usb 0003:15D9:0A4C.0001: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-0000:00:1d.0-1.2/input0
[ 18.125213] input: PS/2 Synaptics TouchPad as /devices/platform/i8042/serio2/input/input9
[ 42.155474] input: USB OPTICAL MOUSE as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input13
[ 42.155630] generic-usb 0003:15D9:0A4C.0002: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-0000:00:1d.0-1.2/input0
[ 51.762499] input: USB OPTICAL MOUSE as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input14
[ 51.762656] generic-usb 0003:15D9:0A4C.0003: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-0000:00:1d.0-1.2/input0
[ 969.368393] input: USB OPTICAL MOUSE as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input15
[ 969.368794] generic-usb 0003:15D9:0A4C.0004: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-0000:00:1d.0-1.2/input0
[ 987.447340] input: USB OPTICAL MOUSE as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input16
[ 987.447660] generic-usb 0003:15D9:0A4C.0005: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-0000:00:1d.0-1.2/input0
[ 1249.418255] psmouse serio2: TouchPad at isa0060/serio2/input0 lost synchronization, throwing 1 bytes away.
[ 1261.994752] psmouse serio2: TouchPad at isa0060/serio2/input0 lost synchronization, throwing 1 bytes away.
[ 1275.835098] input: USB OPTICAL MOUSE as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input17
[ 1275.835720] generic-usb 0003:15D9:0A4C.0006: input,hidraw0: USB HID v1.11 Mouse [ USB OPTICAL MOUSE] on usb-0000:00:1d.0-1.2/input0
[ 1289.637009] psmouse serio2: TouchPad at isa0060/serio2/input0 lost synchronization, throwing 1 bytes away.