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Edited by Narly9999 at 2020-5-3 23:59
NYgrule56,
You should be able to switch which ever desktop to xfce. I've seen the different desktops are switchable if I did understand correctly. I beleive you just run: sudo apt install (desktop install utility of choice)
Did a search for tvservice and I see one site is saying there are three diffrent commands/modules that will do this. vcgencmd, tvservice and cec-client. Relavent or not, I dunno. But it does appear to be a module which might be avilable from the repository. I.E. sudo apt install tvservice
Should I try that first? Hmmm,, Hang on a sec. I was able to find cec-utils was availble for install on Ubuntu Mate. I typed in the commands from the terminal command line. I.E. username@computer:-$ tvservice, username@computer:-$ cec-client and username@computer:-$ vcgencmd The other two commands returned, command not found, but the cec-client returned it was able to be installed. These results will be diffrent or the same for you. As I am runing this on an odroid XU4 with Ubuntu MATE, it might be uncompatible yet that doesn't mean unconfigurable. Wait, I guess I could try on an ARMBIAN box. Let me switch. Okay, the same results on ARMBIAN as are on Ubuntu MATE.
I did some google searches for the cec-client and cec-utils. Lots of returns. Not sure of it's specific application to turn the monitor on and off. Maybe it's in the docs some palce.
Eventhough they are discussing respberry pi, many of these commands should work on other linux systems. It's just that raspberry pi is the go to for many as a well traveled road.
Well, that's my findings. I wonder if I can find the command to dim the tv. Well there is a command that pours out all the commands it understands. Hmmm,
Dogs want fed. I'll check back later.
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