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When I logged in my work environment from Citrix Receiver in Windows it works normally. When I tried the same in Ubuntu it works but there is a black box about double size of mouse pointer. It does work but it seems too strange. Is there some specific configuration that I could look at?

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I was having this exact same problem. Apparently its to do with 'alpha blending' on the mouse pointer shadow (see here

The following fix worked for me:

1) Log into citrix session 2) On the remote machine youre logged into go to: 3) Control Panel > Mouse > Pointers 4) Under Scheme select None 5) Hit apply

Hope this works for you.

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Solved it for me, thanks! – Adversus Sep 28 '15 at 10:36
Worked perfectly, thank you! – Shawn Abramson Apr 8 at 23:15

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