I notice gains immediately workout to workout whether on or off after a long layoff.
I just make sure I eat enough and sleep enough.
I have come back off a long layoff many times and 5x5 linear style has ALWAYS worked awesome. 5lbs jump every week is the slow method building back up and beyond over several months time and 10lbs a week is the fast way, but obviously loads your body alot harder.
This is the 5x5 I would recommend
Monday
squat 5x5, last set is the heavy main set
bench 5x5 same deal
row 5x5 same schtick
wednesday
military press 5x5
deadlift OR powerclean 5x5
pullups OR chinups 5x5
Friday
Squat 4x5 warmup sets, 5th set do a triple with 5-10lbs more than monday, then do a 6th set of 8 with your 4th warmup set, example 135x5, 185x5, 225x5, 275x5, 315x3, 275x8
Bench-Do the same things as the squat above
Next monday squat and bench the weight you did triples with for 5 reps and then that following friday go up 5-10lbs and do a triple etc etc.
This has NEVER failed me so long as sleep and eating were in order. Actually it has never failed me period and I've come off more layoffs than I care to admit.
I would suggest finding "roughly" where your max is on the squat, bench and dead and then set your starting weight below that where you are confident you can do a solid set of 5 without having to work too hard. That way within a week or 2 you will be straining, but it will always feel doable especially because you know on monday's that you only have to do 5 reps with what you did a triple on the friday before.