As a matter of fact, mine is AT, so daily ear-shift is automatically done by FTO itself.
Only worried about it when I need some extra fun.
Conclusion: "Shift indicator"( I don't know if it's called this name) like the one on civic type R can replace the basic function of rev meter on a AT version car.
After searching the forum, I decide to replace the ignition failure sensor, hope it can revive the rev.
I had that issue on mine, it seems that part of the loom is fouled by the hood release mechanism. I pulled my entire dash apart and ended up moving things about a bit and it's fine now. Re-insulate stuff too.
Search here for "fto recall" I think, someone put a link to a site detailing all recalls the FTO has had and that is one of them.
Ignition Failure Sensor is probably the easiest thing to rule out first. Should only cost about $70 delivered and is a 1/2 hour job at most to replace.
Failing that, time to start investigating things such as that mentioned by FTEvolution, but I would definitely start with the easiest stuff first. I've replaced the IFS on both my FTOs and it fixed the problem both times.