I have Ubuntu 16.04 LTS installed and, I left my computer downloading something and a few minutes later my computer freezes and I can still move my mouse but, Nothing would work Is there a way to fix this? And is this a Hardware problem? I have a HP Pavilion 500 223w and Geforce Graphics card (Forgot what model) Can anyone help? Thanks! In the logs it says Feb 5 15:33:31 tristan-500-223w org.gnome.ScreenSaver: ** (gnome-screensaver:3287): WARNING **: Couldn't get presence status: The name org.gnome.SessionManager was not provided by any .service files
It sounds like a GPU hang. Your system may not be properly halting display services when sleep activates and that would result in a paused display. Ensure your drivers are up to date, and if possible, check for any listed bugs with that particular software revision. I think ctrl+alt+bckspc restarts the display+session manager, but I'm not sure what's different between Wayland and Xorg. Rebooting is my only temporary solution.