Re: Booting into Win7 causes erratic multitouch in Ubuntu
To the OP: since, unfortunately, Canonical has STILL not seen fit to provide any way of doing a roll-back to an older version of Ubuntu, once you do an upgrade, I would NOT upgrade to 12.04 at this time.
IF you do decide to do that after it's released, I would suggest you look into using Clonezilla to image off your current Ubuntu setup to an external drive. At least that way, if 12.04 is no improvement, or if it makes matters worse, you have an easy way to get your current setup back.
Ubuntu 15.04 Mate, Mint 17.1; MS Win 8.1, Win10 TP.
Will not respond to PM requests for support -- use the forums.