Intermittently, my Dell Inspiron 13 with Ubuntu 18.04 doesn't let my keyboard work after suspend. There is no pattern that I can discern. Touchpad still works. Touchscreen still works, allowing me to still use the touch-keyboard to login - from there, I have to close all programs, restart the system, in order to get the keyboard working again.
I have tried switching to LightDm - it doesn't work. I have tried working with GRUB_CMDLINE_LINUX or to GRUB_CMDLINE_LINUX_DEFAULT - it doesn't work. I have tried various solutions to do with NVIDIA drivers - they don't work.
I am now at the point where, if I can not find a resolution to this problem, I will switch to a completely different Linux OS, despite having worked with various versions of Ubuntu over a decade.
I simply cannot do my job with an OS that makes the simple process of suspend/restore ineffective.
Solutions very, very welcome.