gaalaaant


Did you not have fps in terminal when glxgears was running?
Its good to see if open gl is working and to check drivers, Its for 3D.
Install 'GtkPerf' simple but good video tester.

Do you have Ubuntu tweak? Real handy never had a problem with it.
It will also install PPAs you'll be testing,compositing & so on.
http://launchpad.net/ubuntu-tweak/0.....5.4-1_all.deb

Your xrandr looks correct, How were you setting 75hz on resolution
60 is normal for LCD but shows 75?

Sharky

OK seen your fps in glxgears