I seem to have a problem. I am running ubuntu 12.04(64 bit) on my HP ProBooK 4530s (i5-core, 8GB, ATI RADEON HD6790) and I had some heating problems. I've managed to install the graphics driver from the website using this method:
All seems well, but when I switch to graphics mode to use the low power Intel onboard graphics card and I restart there are no more Unity elements - the upper menu bar, the dock on the left and when I managed to open a window (right click on the desktop) there are no longer the close, minimize, maximize buttons.
Didn't anyone else encounter this problem?