I just read αғsнιη's answer on What causes Pinta to crash instantly when I begin image selection?
But what does the first line of the solution mean?
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
I have never encountered this command before. Is it safe to use?
I am running Ubuntu 17 on a Surface Pro 4. I had the same issue with Fedora 27. Both running gnome as desktop.
I have a external (DELL) monitor connected to my surface 4. When I close the lid, internal and external display turn off. After opening the lid, only the external screen works, the internal screen stays black and is even not listed under devices anymore:
Any idea how to solve this issue? How can I get my internal display to be used again after lid close event? Also I want to report it on Bugzilla, but what is the right category? New -> Core and then? gnome‑desktop?