I recently installed Manjaro XFCE on a 2013 Macbook Air. When I shut it down using the menu, I don’t think it’s shutting all the way down. If I put it in a bag, it stays hot, the battery depletes, and it wakes back up with a couple of key presses.
I did a little research and some people suggest editing /etc/default/grub. See here:
However, the relevant line in my grub file does not look like what these other users are describing, so I don’t want to just randomly mess with it.
Here is the possibly relevant line. Should I edit it, or perhaps do something else entirely?
On all computer I touch I also add the splash parameter to go with the quiet parameter, so instead of a black screen (quiet hides the console boot process), it will, on most computers, show the motherboard/manufacturer logo during boot, so for your GRUB command line it would be