Although your log is full of this bug's message, it has nothing to do with "computer may stop responding". It looks like you have some kernel crashes there so should create a new bug about them with:
ubuntu-bug linux -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1857392 Title: Window manager warning: Overwriting existing binding of keysym... To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1857392/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
