I'm using Ubuntu 12.10 on my MSI X460DX notebook for a few weeks. Touchpad worked without problem. 2-finger scrolling worked as well as disabling touchpad with key shortcut. But now after a restart touchpad just stopped working completely. System Settings->Mouse and Touchpad->Touchpad tab was not here So I tried to run sudo modprobe psmouse and than it started working, but the touchpad settings still aren't here and neither edge scrolling nor 2-finger scrolling is working. I also can't disable it. I found out, that the touchpad is recognized as PS/2 Generic Mouse instead of my elantech touchpad.
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ A4TECH USB Device id=10 [slave pointer (2)]
⎜ ↳ A4TECH USB Device id=11 [slave pointer (2)]
⎜ ↳ PS/2 Generic Mouse id=13 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
Is there a way how can I get my touchpad working properly as before?
I found the solution! I found it here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/667707 and a workaround from comment #3 worked.
sudo rmmod psmouse
sudo insmod /lib/modules/`uname -r`/kernel/drivers/input/mouse/psmouse.ko
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