I reinstalled Ubutu 15.10 from a iso on DVD. Problem fixed.
Linux toshibaS75 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
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The problem persistis in Ubuntu 14.10.
Now, after some lock screen, it returns with gray and green.
I took a print screen and a photo of the screen.
** Attachment added: Issue photo
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1271704/+attachment/4304349/+files/IMG_20150123_113842.jpg
Print screen don't show the issue
** Attachment added: Print screen
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1271704/+attachment/4304365/+files/Captura%20de%20tela%20de%202014-11-03%2009%3A47%3A10.png
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** Changed in: xorg (Ubuntu)
Status: New = Fix Released
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https://bugs.launchpad.net/bugs/1271704
Title:
Screen Flickering and display problems
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Seems the same problem: http://ubuntuforums.org/showthread.php?t=2188084
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https://bugs.launchpad.net/bugs/1271704
Title:
Screen Flickering and display problems
To manage notifications
