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?
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?