a few weeks ago i installed a screensaver program, due to the lack of screensavers in 12.04, but i did not like the program, and i uninstalled it. however, now when i leave my computer alone for a while, it goes to sleep and my screen shuts off. basically it locks itself. this is annoying for me simply because i have a mapped network drive from my computer that runs to my other computer in my house... and when my computer locks itself, i can no longer access said drive.
all of my setting in the system setting are set so that the pc should never lock...