# Program interface is stuck when switch between fullscreen and windowed

**URL:** <https://discourse.glfw.org/t/program-interface-is-stuck-when-switch-between-fullscreen-and-windowed/722>\
**Category:** support\
**Created:** [August 6, 2016, 4:01am UTC](https://discourse.glfw.org/t/program-interface-is-stuck-when-switch-between-fullscreen-and-windowed/722 "2016-08-06T04:01:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Uni](https://avatars.discourse-cdn.com/v4/letter/u/9d8465/32.png) [@Uni](https://discourse.glfw.org/u/Uni)\
**Post date:** [August 6, 2016, 4:01am UTC](https://discourse.glfw.org/t/program-interface-is-stuck-when-switch-between-fullscreen-and-windowed/722/1 "2016-08-06T04:01:38Z")

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I just run the example program ‘boing’ on ubuntu 16.04. I pressed alt+enter to switch it to fullscreen and then again to windowed.After a couple of times,program interface is stuck.But It work fine on windows.  
whats wrong with this?Is that a BUG? Does anyone have the same problem