It was fresh install of 12.04 and ran perfectly until two weeks back or so. Before that I had 11.10 and 11.04 and never faced this kind of problem. I try to keep it up to date and install updates whenever I am prompted.

For last two weeks whenever I resume from my laptop in suspended state, I was thrown to login prompt after few minutes. I enter my password after resume, login, start working only to find out I am back to login prompt after few minutes.

Now my machine is shutting down randomly. I am working on my laptop, power supply connected and it just shuts down - at least it did 3 times during last 4 hours. Lost lot of work too.

Any one has any ideas? Please please share.