I'm doing a project right now that involves using a micro servo.  One is on 
port P8_13 and another on P9_14.  

Everytime I boot the beaglebone it gives me - error: Error enabling PWM 
controls: Error: ENOENT, no such file or directory 
'/sys/devices/ocp.3/bs_pwm_test_P9_14.15/polarity'

When I check this file it shows a value of '1' inside of it.  Where the 
same file for P8_13 shows a zero.  When I change the P9_14 polarity file to 
0 the servo works as intended.  I'm really confused why the polarity is 
being set to 1 every time I boot the beaglebone.  This also happens if I 
move the servo to P9_16.

I did just upgrade from Debian 7.8 to 7.9 but I don't see how that would 
change the GPIO behavior.

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