Hi,
I've got a seemingly random system crash. Based on the logs, it appears that the X server is freezing. This crash is generally associated with web browsing, but it requires active user user of the web browser (not just watching a video, for example). The event that triggers the crash is not necessarily associated with the browser (last time it was simply clicking on the application menu). It seems that the network manager gives the same message in the log files every time the crash happens (see below for the logs).
After crashing, I've tried to kill the X server (ctrl+alt+backspace), but that causes the screen to switch between black and just showing the cursor. It settles on just showing the cursor, however at that point even the mouse does not work. Here are the relevant sections of the logs: http://www.princeton.edu/~nhuang/logs.log
If you need anything else, please ask. Thanks!