Problem: Keyboard mouse won't respond after lock Ubuntu 16.04
System Details: Asus X552C Laptop (4 GB RAM,250 GB for ext4, 6 GB for swap space) Mediatech MTK Regular English Keyboard & Logitech Mouse Fresh Install Ubuntu 16.04 LTS
Issue Details: I've set the Screen-Lock for 2 min. After locking, I need to enter the password to unlock the screen.
Intermittently, Alphabet keys on the keyboard just won't respond. I cannot enter the password. Mouse intermittently works, I can click on the right most Arrow button on the password field, which will give me the error message "Invalid password".
On a related note, I installed Sublime Text3, Alphabet keys won't respond, but capslock, tab, enter, Ctrl+C, Ctrl+V works.. All keys work fine in VIM, GEdit, ...
It is tuff to pinpoint the problem to either NVidia Graphics, Xserver-org, ...
Any pointers would be helpful.
Note: I'm only powering off & then powering on the laptop on each occurrence of this issue.