Ok, compiz is disabled for i815 because of bug Bug #221920.
Please search for a bug report against pulseaudio which is similar to your
problem or open a new one.
I guess it is the best to move your issue upstream but I have some questions.
Did the screen errors and color problems appear with the standard xorg.conf
directly after start or not until you start a 3d game or glxgears?
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete => In Progress
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bugs and fixes to play 3d games on i810 i815
https://bugs.launchpad.net/bugs/243991
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