Comment 4 for bug 1779661

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Khurshid Alam (khurshid-alam) wrote :

It is probably mate-specific issue. Try raising the issue on https://ubuntu-mate.community.

Application switcher (Alt+Tab) is enabled by default under Unity & it is fine. See: https://i.imgur.com/add9tto.png

It could also be a problem with graphics driver.

Compiz not changing background color is a valid bug though. Does it also happen gnome-flashback (compiz) session?

Try `compiz --replace` in terminal and toggle set-background-color. What does the output say?