Been struggling with this for the last days.
I have a Samsung Galaxy S3, Rooted, with CM11 for i9300 (nightly).
Everything seems to work properly except for the Proximity Sensor.
When I make calls the screen will go black and won't recover.
Proximity Sensor Finder
always show 0.0 cm as if objects are constantly near.
These are the things I tried so far, with no luck:
1. Opening the device and cleaning the sensor.
2. Creating a bolder separation between the two receptors of the sensor
3. Running Auto Calibration
4. Running Manual Calibration
$ cat state #finger on the sensor to test if the sensor is working properly
$ cat state #blank value
$ cat prox_cal
Which means my 'new' calibration adds up to '0' which makes no sense (is it?)
What else would you suggest? This is really frustrating