Comment 26 for bug 1033263

I can confirm this on 12.04 LTS and also on 12.10 with a very fresh install of ubuntu.

Its absolutely regardless which nvidia driver i activate (current, current-updates, experimental) the desktop freezes randomly with ativated nvidia driver.
Sometimes the system freezes complete, desktop, mouse and keyboard are stocked.
Sometimes only the keyboard and desktop freezes. and i can move the cursor but are not able to make the dekstop response do any kind of mouse interacting.

If i change back to NV driver the system runs stable.

Also this only happens the very first boot on the day. If i restart my system i can run it for hours without any problem.
For now i have deactivated the nvidia drivers, hopefully someone can fix this.

I also can confirm (but im not sure) that this must have to do with unity as im running a dualboot system with 12.04 LTS and Ubuntu Studio 12.10. On Ubuntu Studio which uses XFCE the system runs stable with the latest nvidia driver activated.