After going down to 1 virtual desktop & changing the input settings, it happened one more time.
I've gone back to 2 virtual desktops, & I made a few changes in the compositor settings: animation speed lowered about 2 clicks scale method --> smooth opengl --> opengl3.1 instead of 2 So far so good. Used it for about 6 hours yesterday & 4hrs today w/o problems -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1516108 Title: system freezes requiring hard reset at unpredictable times under different activities Kubuntu 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1516108/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs