This still happens with a fresh install of Ubuntu 13.04 (final release), using nvidia driver 313. Correcting the refresh rate (uncheck autodetect, set to 60) in CCSM fixes it.
This still happens with a fresh install of Ubuntu 13.04 (final release), using nvidia driver 313. Correcting the refresh rate (uncheck autodetect, set to 60) in CCSM fixes it.