I tried everything I could
So, I got back home and started trying many things I saw on the web.
I reflashed again, using odin, different roms (now I'm keeping Eryigit-GB-2.3.6 G70ZCKPA Galaxy Player 5.0 For USA and INT (Rls:3.5) with rotation off).
I also tried what I have posted before and it didn't work, actually I found 2 files similar to the ones posted before: One is caled sensorlib_yamaha_test.so and the other is sensorlibconfig.so (not pretty sure about the name of the second file).
What happened during my attempts was that: before, the X sensor had the problem (value -9 with the cellphone laid on a desk, at horizontal position) and now, surprisingly, the X sensor is OK and now the Y sensor has the failure.
Using the HORIZONTAL CALIBRATION in SAMSUNG 2.3.6 (or 2.3.5, whatever), the ball only stays in the middle of the screen if I keep my phone in vertical position - upside (cause of the Y axis). Even if I rotate the tab in every direction possible, the ball never goes UP, so it only keeps with negative values and never positive ones.
BUT If I shake the phone, not so hard and not so soft, I see the ball of the calibration software moving on all directions. But when I manage to do it softly (as we do with normal use), the ball never goes up.
I have downloaded many sensor programs to test the calibration and after trying about 20 programs, ONLY ONE have showed the exact values as if the accelerometer was normal, but the calibration of the program did not affect the accelerometer on the system and other programs.
So, this is it, of course I won´t give up and try as many things as I can. Here in Brazil we have a saying that is: I'm Brazilian and I never give up.
P.S. I hope someone reads this and give me ideas. hehe
Thanks in advance.
Have a nice day u all.