How to close window/app when i cant see it? ubuntu

Posted by tm1rbrt on Super User See other posts from Super User or by tm1rbrt
Published on 2009-12-13T15:26:59Z Indexed on 2010/03/18 13:21 UTC
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ubuntu

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linux

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x-windows

Im running ubuntu. I just tried to play supertux but my LCD didnt support the resolution and all i got was a blank screen and music playing. I tried to close it and go back to the desktop by pressing ctrl + z but that didnt work so i had to hard reset my computer!

In future what should i press when this happens?

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