When I enter the command unity-control-center it returns:

libEGL warning: DRI2: failed to authenticate
Segmentation fault (core dumped)

The error is possibly due to nvidia graphic card. To mitigate the error I used the following command: prime-select intel.

Try opening the unity-control-center now. My unity-control-center was working fine under nvidia graphic drivers but stopped when I changed the xorg.conf by switching to intel graphic drivers for screen. It might be the possible cause of introduction of this error.


What helped me in the same problem just after a fresh installation without the internet (so no updates) was:

  1. Update everything (sudo apt update; sudo apt upgrade)
  2. Update the graphics drivers (sudo ubuntu-drivers autoinstall)
  3. Reinstall the app with sudo apt-get install --reinstall unity-control-center

use "sudo unity-control-center" and enter your password

But why you do that through terminal?

Hope it helps

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