On Friday, somehow, I accepted an update on my computer from Ubuntu 12.04 to 12.10 ..... very very big mistake
After update display went black, no way to resolve display issues due to new drivers that are simply incompatible with H/W on my computer, wifi also shut off and well.......
Also tried Ubunti 13.04 some month ago, this being extremely unstable, somehow some of the wireless networks are not found, sometimes it's ok.... seemingly lots of other's have the same issues with 13.04 and decided to go back to 12.04, and again lots of issues with display suddenly going off and sometimes unable to shutdown computer.....
So now for the second time in a few months I reinstalled Ubuntu 12.04 on my PC (Dell XPS 1645) and it seems like all works, also decided to install cinnamon desktop as the Unity 12.04 desktop is just crap....
So be careful with these Ubuntu updates guys.....
After many years of running linux I'm probably going away, this is just getting too messy.....