I'm very new to the Linux world and have just recently installed 12.04 Ubuntu onto my Dell XPS L502X.
Recently, after maybe 10-30 minutes of just surfing the web my entire screen will freeze. Mouse will stop responding. Keyboard will not respond. And the only way I can change anything is with a hard power off or by using REISUB.
Does anyone have advice on how to prevent stuff like this? I'm still really new to this type of stuff so anything would help!