Under Xfce I can put the mouse pointer to the right screen edge and still activate i.e. the lift of the maximized browser window. Under Kde the mouse pointer goes out farther and I have to move the mouse a bit to the left to catch elements of a maximized window. How can I change this?

  • If the monitor or screen is a CRT, then adjust the monitor's controls, (if it has any).
    – agc
    May 30, 2016 at 14:32
  • 1
    no, its a tft. i thing its a feature, not a bug, for the mouse to be able to disappear.. May 30, 2016 at 14:39

4 Answers 4


Me too had this problem. My mouse went out of screen to some imaginary location outside and had to return the same distance to come back to the viewable area.

Solution Go to All Settings > Displays If its as of my case, you will see a box call Unknown Display to the left of Built in Display in a big box with grey background

Click on unknown display and de-activate it by turning off the button just below the grey box.

This solves the problem!


It could also be your display driver. In recent versions of Ubuntu (14, 16), initiate "Additional Drivers" under System Tools -> Preferences. If you find alternative, usually proprietary, display drivers, you could try one of those.

I fixed the exact same problem on my Gateway NV57H by switching from the xorg Nouveau driver to the nVidia-375 driver.


I had the same problem and resolved it by going to "Display" and finding that I have two screens. The main one is highlighted in red and there is a blue screen off to the side labelled "uknown". So i clicked on the "unknown" screen and there is a tick option to turn it off which i did. After doing so I had no more problems :)


The way I have solved this issue of the mouse pointer getting out of the screen to the TOP is by making sure all displays on display settings reach the same height, and are aligned at the top.

I can achieve that all monitors have the same height by dragging the monitors with the mouse in display settings screen, to get them like this:

This is how you should set up your displays: This is how you should set up your displays

Don't do it this way, since the mouse will go out of the screen since the top parts of the monitors are not aligned:

Don't do it this way

  • 1
    As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center.
    – Community Bot
    Feb 3, 2023 at 16:03

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .