Since last week X.org has become very unstable. X dies and restarts itself at random times (sometimes in less than a minute, and sometimes after 10+ hours). I have searched the forums, and tried the various fixes- including creating a new account, re-creating .Xauthority, and changing permissions in /tmp. Nothing seems to be fixing it. I even installed an older kernel and older NVIDIA drivers, but still no success. Any ideas or suggestions are most welcome. My Xorg.0.log and startx.log.txt is attached below. The haldaemon is running on my system.