I'm actually using Kubuntu 16.04 with KDE Plasma 5.8.
It runs normally, but, when I play a game or after an 1 hour or less of of PC turn on, the graphical environment dies without any way to reboot it through command line or similar.
When that happends, I must to reboot the machine again shutting down or rebooting manually with the reboot button, I don't konw why happends that, so any idea how to fix it or what I must to install to fix that issue?
