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My close / maximize / minimize buttons sometimes disappears, as well as my top menu after my system comes back from sleep.

It goes is transparent and not black (ambience theme). How can I fix this? Is it a Kernel or graphic problem?

My notebook is a ProBook 4520s and I use Intel HD Graphics

  • Press Alt+F2 then press r then enter. Does that fix it? – Tim Apr 30 '16 at 14:53
  • Hi Tim, nothing happened when I press Alt+F2. The command unity --reset temporary fix the problem, but they come back if I suspend again or passed a few hours. – user68624 Apr 30 '16 at 15:08
  • The problem persist. Anyone can help me not going back to Windows? – user68624 May 3 '16 at 17:48

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