After installing kali 2018 v3 lxde > dist upgrading to 4.17.0-KLALI3-amd 64
copy paste seems not to function > right mouse click copy, paste > Ctrl C , V > mouse select, middle click... no luck.
tried (firefox, leafpad,tested different terminals... nothing works)
i removed, mouse,keyboard, and other usb hardware that could be conflicting, and tested it with other hardware...nothing works.
It seems when i try to select text the focus disappears immaturely.
Is there a CLI command to check, conflicting hard/software that steals my focus?

Imagine, Linux without the middle mouse copy function, is like using M$ windows without mouse, keyboard, touchscreen and bugs for me

(btw i don't like other desktops)