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As you can see from the screen shot below, there is a display problem in my virtualbox guest running on an Ubuntu 12.04 64-bit host, using dual monitors.

The line does not appear on the monitor the mouse pointer is on, only the other one.

I am running the latest Virtualbox (4.1.14) with GuestAdditions installed.

enter image description here

Any suggestions for how to resolve this?

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  • This issue has been resolved for me by a recent update.
    – amc
    Jun 8, 2012 at 16:20

1 Answer 1

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It looks like it's the Panel's shadow. Just make sure your panel is not "transparent":

Launch the CompizConfig Settings Manager, go to the Ubuntu Unity Plugin, on the Experimental tab there are two Panel Opacity options you can tweak.

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  • setting panel opacity to its lowest value (0.01) did fix the problem in virtualbox, but now I have very transparent panel :S
    – amc
    Apr 30, 2012 at 19:01
  • but what's the problem? do you wan't to completely get rid of the panel?
    – Simón
    Apr 30, 2012 at 22:56
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    the problem (from my original post) is that I shouldn't see the panel when I am running the guest os in virtualbox. although changing the opacity of the panel DOES resolve this issue in vbox, it's not a great solution overall because now my panel is transparent.
    – amc
    Apr 30, 2012 at 22:59
  • Ah... Ok... I guess I've got it now. Probably a bug in VirtualBox? I haven't tried it on 12.04 yet.
    – Simón
    May 1, 2012 at 0:26

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