When I move my windows around they are really laggy. I had a feeling it's because Ubuntu isn't taking full advantage of my graphics card so i went to install the additional drivers. The normal proprietery one does nothing to help the window issue and everytime i try and install the post release update it says "Sorry Installation of this driver failed"
2 Answers
I can't comment on the failed post-release update in the restricted drivers tool, but I have experienced the laggy windows and I read that you can un-tick "Sync to VBlank" in the OpenGL module in the General section of ccsm (if you don't have ccsm, sudo apt-get install compizconfig-settings-manager, then just run "ccsm"). I also read this affects mostly ATI cards.
If you have an ATI Graphics card, you can't install the post-release-update one because the fglrx-updates ubuntu package is broken (bug: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/949641)
I also got that problem. So I went ahead and installed the normal one. It does not fix the laggy windows on my computer, and it also caused my computer to become unstable. (Reported Bug: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/995184)
So I'll just wait until the fglrx-updates package is fixed. You'll able to install the post-release-update Driver.