This is an FP2 issue with the latest FPOOS installed.
This has been discussed earlier, but because those discussions timed out, I cannot add anything.
One or two years ago my FP2 battery was worn out. Before I got a new one, I deliberately maxed out all powersaving options, and since then after 30 seconds or so the display dims and blacks out.
What was a good idea then is now a nuisance, and I cannot get rid of it. All settings above 30 seconds are ignored.
I read the comments to disable the system variable for it as a root command, but how do I issue those? I know how to use a bash in a Linux environement etc. But switching root mode (in dev options) does not give me root priviledges in Termux (the terminal app I got here).
When I issue a “su” in Termux, my FP simply reboots (nothing bad happens, it just reboots).
How do I get a root console?
Btw, the security warnings I have read, but I think the danger can be lessened if the given tip is extended by first printing out the current value of the this variable (and written on a piece of paper), so the value can be reverted it not the desired effects happen…