title: Black screen after waking from suspend Ubuntu Budgie 18.10
body: <p>I have a Dell XPS 15 9570 with Ubuntu Budgie 18.10 installed on it. When I'm using the integrated graphics card from Intel (by issuing <code>sudo prime-select intel</code>) everything works smoothly, but when I select the NVIDIA dedicated graphics card (issuing <code>sudo prime-select nvidia</code>) I can't wake from suspend: when I re-open the lid after having closed it, the screen remains black. I can tell that the system actually woke up because the fan makes some noise and the keyboard's backlight works fine.</p>
  
  <p>My dedicated graphics card is the Nvidia GeForce GTX 1050 Ti, and the driver version is 390.87</p>
  
  <p>How to fix this?</p>