add one more thing to your FAQ ._. why are we discontinuing fusion support?
i have not owned a Y300 for a good 6+ month now.
When set 'no background process' in dev settings,can't toggle mobile data and sometimes apps closes it self. I found only this issue so far.
I got 100mb free ram if i set no background prcss.
that's bad, and not really an issue, as its not supposed to be left on for normal usage... that's why its hidden from end users, and a developer option
forcing more free ram is not good on android, and when you stop background processes you are not allowing the ram to be utilised properly (no multi tasking)
this is why apps are closing, ram is used to hold stuff in memory so things open faster and use less CPU cycles, which also saves battery,
so on android "it will" try to use up the ram straight away, and when more is needed for new stuff it kills older processes automatic.
anyway, you are going about what you are trying to achieve the wrong way, put everything in the dev settings back to normal first.
Settings / FusionX / Performance
Swipe to the left, select free memory, choose your option, press back and select Set on boot.
on a phone with 512MB i recommend using the 50MB option, or more resourceful games might close or run slow
as the higher you set your free ram the less your phone has to work with, which is already low.