How to Fix the Cairo Dock Black Background problem. On many Linux systems when hardware rendering is disabled and a composite manager is disabled, Cairo themes will display a black box or rectangle behind the dock. This issue can be fixed by installing a video hardware driver, activating desktop effects, starting compiz or activating composition in metacity. However, to quickly address the issue, we can simply emulate a transparent background.
How to quickly Fix the Cairo Black Background Issue
- Start your Cairo-Dock
- Right Click on the Dock and select Cairo-Dock > Configure
- Under the Behaviour Section, Click System
- (1) Scroll down to Composition and check the box “Emulates composition with fake transparency” (2) Click OK
If all goes well, your Cairo Dock should now look similar to this: