I know this is not a supported OS but maybe some1 out there is having the same issue i have and may work out a fix. I usually alt+tab out of the game window (fullscreen windowed) but now my mouse cursor stays locked to the game window. I can hover over any other window i have open at that time but as soon as i click on it the cursor changes back it shape to the game cursor and registers the click as if it were ingame (character attacks even when other window is on top). It could be just related to linux or my window manager, just want to know if any1 out there is having this same issue.