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Sometimes (about once a week) the control keys (ctrl, shift, alt) so not work anymore. They do work when I boot up, but after a while they stop working. Logging out and in again repairs it. What can cause something like that?

It is a laptop keyboard (HP EliteBook 8730w) with german layout.

Incidentally it just happened right after vmware-player crashed same as the last time. Coincidence?

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closed as too localized by Bruno Pereira Mar 18 '12 at 15:34

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What keyboard do you have? Laptop or desktop? Type? (PS/2 or USB) –  Lekensteyn Mar 18 '11 at 8:56
    
It's a laptop keyboard. –  EricSchaefer Mar 18 '11 at 9:03
    
Ok, and what model? Please include it in your question. –  Lekensteyn Mar 18 '11 at 9:04
    
Please see if the attached solution is working for you. phpfox.com/blog/ubuntu-ctrl-key-not-working –  JohanSJA Aug 3 '11 at 9:37
    
Right now I am not using vmware very often so I can not tell if it helps. Please write an answer formulating the fix behind your link, so I can accept it in case the problem happens again and your fix works. –  EricSchaefer Aug 3 '11 at 10:09
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