Great news about downgrading the kernel. Next, please find the closest two kernel versions where one works and the other doesn't. You can download them from here: http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
Mice that refuse to click are likely a different problem. See: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bugs?field.tag=noclick https://bugs.launchpad.net/ubuntu/+source/mutter/+bugs?field.tag=noclick -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1775016 Title: [Dell Latitude E6420] Ubuntu/Xubuntu 18.04 bug: Keyboard stops working in the middle of typing when running firefox and when running the terminal (sudo su) and similar programs until reboot. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1775016/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
