I also see similar messages in my ~/.xsession-errors after X server crashes, which happen frequently on my machine, generally after resuming from suspend or otherwise unlocking the screen. Precise i386 with all updates, ThinkPad T520.
I also see similar messages in my ~/.xsession-errors after X server crashes, which happen frequently on my machine, generally after resuming from suspend or otherwise unlocking the screen. Precise i386 with all updates, ThinkPad T520.