Upgraded to Ubuntu 14.10 and *everything* lags

Yesterday, I upgraded my Lenovo Thinkpad X1 Carbon (2013) from Ubuntu 14.04 to Ubuntu 14.10. Since then, everything lags, from applications when opened (or 'drawn back in the background' for an overview of all open applications) to password entry on log-on. Even Google Chrome: youtube videos stutter. Also, when typing this, I feel a bit of a lag. Does anybody experience the same? Maybe under different hardware? [I used the standard software updater to update]

I have a new carbon. I had slow redrawing of windows and other problems, although no particular problem with video. Fixed with: https://wiki.archlinux.org/index.php/Intel_graphics#SNA_issues

If you are experience issues with SNA, try using UXA instead, which can be done by creating an X configuration file containing the following: /etc/X11/xorg.conf.d/20-intel.conf Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "uxa" EndSection

EDIT: DO NOT USE THIS SOLUTION. SNA has been fixed. Upgrade your kernel (at least 4.0 probably) and video card drivers (>=2.99.917 i think) instead.