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I’m using a clean install of Ubuntu 16.04, on an LG laptop which is quite old, which happens to get “stucked” in full screen mode when running programs ( for example -VNC Viewer, imageViewer ).

PC is not FROZEN since mouse moves OK but I can’t get out from full screen mode- which ends with hard shutdown.

  1. Any known reasons for that ?

  2. Is there any key combination as CTRL+ALT+DEL in Ms-Windows for such situations ?

George Udosen
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guyd
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  • Did you try the escape key? – George Udosen Oct 12 '17 at 07:46
  • In VNC Viewer, did you try hitting to get the toolbar and disabling fullscreen mode there? – dessert Oct 12 '17 at 07:46
  • You might want to have a look here: [What are Unity's keyboard and mouse shortcuts?](https://askubuntu.com/questions/28086/what-are-unitys-keyboard-and-mouse-shortcuts) + to close a window and + to switch between windows may help you. – dessert Oct 12 '17 at 07:48
  • I tried every key on keyboard – guyd Oct 12 '17 at 07:50
  • @dessert I even pressed on X at VNC's tab to close connection with no luck. – guyd Oct 12 '17 at 07:57
  • It seems to me that when I do vncviewer -fullscreen that no keyboard input has any effect. My current solution is to login & kill the vncserver :-(. – copper.hat Aug 20 '18 at 19:54
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    @copper.hat well it is one way- hopes that there is less aggressive way – guyd Aug 20 '18 at 20:01
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    Even though the mouse pointer can be moved, the methods in various answers to [What should I do when Ubuntu freezes?](https://askubuntu.com/questions/4408/what-should-i-do-when-ubuntu-freezes) apply to this situation. See also [How to fix non-responsive Ubuntu system?](https://unix.stackexchange.com/questions/39846/how-to-fix-non-responsive-ubuntu-system) – Eliah Kagan Aug 23 '19 at 14:33

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I encounter the same issue. I entered ctrl+alt+f2 which took me to the logger page and then i hit ctrl+alt+del and all of a sudden my laptop restarted.

Hemanshu Thakker
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  • Welcome to Ask Ubuntu. This section is for answers. What you posted does not answer the OP's question. Please consider deleting this answer and adding a comment instead. Thank you – Raffa Aug 23 '19 at 19:18