I'm on OS X 10.9.5. I do not like using mouse/trackpad, and mostly work with keyboard only. One annoying thing is that when the OS is locked (screen lock) and the power saving for the monitor is activated, I can't wake it up with a keystroke. I MUST move the mouse cursor to let me type in my password to unlock the screen.
Does anybody else have the same problem and if so is there a workaround?