The problem is system running in low graphics mode even in recovery mode.(Failsafe x Mode)

So I used all the recovery options

Root shell drop doesnt allow to start or stop any service or app

Dpkg configure says system is clean

normal resume boot goes on for one hour with an black screen and cursor blinking.

The last working condition in my computer is:

Changed the theme from unity to gnome from login itself and didnt changed to gdm3, I know its my mistake

but why is that i fail in recovery mode too.

Now I am struck in boot alone.

Can anyone please tell me what is the problem?