/usr/share/psychtoolbox-3/PsychHardware/50-evdev-powermate.conf is in psychtoolbox-3-common 3.0.14.20170103+git6-g605ff5c.dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | # Configuration file for using the Griffin PowerMate knob
# with Psychtoolbox-3 under X11.
#
# This file will make the PowerMate only work with PTB,
# but usually not with most GUI applications.
#
# Delete the "ButtonMapping" line below if you want the
# PowerMate to also control other GUI applications, e.g.,
# to allow control of audio volume, movie players, scrolling
# in web browsers and document readers etc.
#
# File needs to go into /usr/share/X11/xorg.conf.d/
#
# Written 2016 by Mario Kleiner.
Section "InputClass"
Identifier "evdev Griffin PowerMate catchall"
Driver "evdev"
MatchVendor "Griffin"
MatchProduct "PowerMate"
# The line below disables the PowerMate for regular
# GUI apps. Delete the line for general use of the
# PowerMate outside of Psychtoolbox:
Option "ButtonMapping" "0 0 0 0 0 0 0"
EndSection
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