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black dots, or more something like this _-, apprear on my screen, but only in windows, not on the side bar. It is very anoying since it apprear every 30 sec and sometime every 5 sec in row. I have bumblebee installed. It may be related.

Here is a screeshot : enter image description here

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  • You don't have this issue on windows or any other operating system, using that graphics card and monitor?
    – MiJyn
    Jun 27, 2013 at 2:02
  • Had Windows 8 once, no issue at all.
    – varnaud
    Jun 27, 2013 at 4:05
  • okay, that issue looks like as if it's a unity issue, or something of the likes, because the top bar and the launcher seem to be fine... it seems that only the window has a problem. Is this only with chromium? Or is this with any application?
    – MiJyn
    Jun 28, 2013 at 1:15
  • Any application. Getting used to it...
    – varnaud
    Jul 31, 2013 at 3:00
  • Try installing LXDE (lubuntu-desktop), use that (change the session in the login screen), and then see if you still have the same issue. If you don't, we can conclude that the issue is a problem of unity, or something that unity uses that LXDE doesn't (may it be GNOME 3, Compiz, Nux, or anything else).
    – MiJyn
    Aug 1, 2013 at 4:10

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