Hi, I have fedora35 installed on my desktop with a Radeon RX 570 driving three monitors, with the Cinnamon desktop, although it could be the other variation of Cinnamon that's available by default - I checked the Settings menu and can't find any way to determine which it is. I'd like all three monitors to turn off after 15 minutes of inactivity. What is the best way to do that? Simple question, but clearly not a simple answer.
I'm an old-school admin from a time when we had to build our own X11 config files. I just expect things to work now, so I haven't really kept up with the desktop, even though fedora and whatever graphical display it provides by default has been my primary desktop since before Windows XP.
Now, when I set the "turn off the screen when inactive for" option to 5m in the Power Management settings, I find that it takes far longer than five minutes for it to actually turn off the monitors, but then not only do they all immediately turn back on, but all of the windows on the middle monitor are shifted to the two left and right monitors. wtf? It's incredibly frustrating to have to reposition all windows back to their original location.
How do I troubleshoot this?