For health reasons I have to set brightness to a very low value. However, after restart the value always resets - not to a full brightness, but to some preset minimal value. This seems like a good idea, you don't have to worry that you accidentally turn the screen black and will have to edit text config files in the console. But this value is still too high for me.
Moreover, display brightness indicator does not reflect this change: I lower the brightness, after reboot the indicator is still low but brightness has slightly risen. I push the indicator lower still and so on. After several restarts the indicator is close to zero and brightness still the same.
Is there any way to keep the system from applying minimal brightness value or even better a way to change this value?