diff --git a/keyboard/ergodox/00-teensy.rules b/keyboard/ergodox/00-teensy.rules
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+# UDEV Rules for Teensy boards, http://www.pjrc.com/teensy/
+#
+# The latest version of this file may be found at:
+#   http://www.pjrc.com/teensy/00-teensy.rules
+#
+# This file must be placed at:
+#
+# /etc/udev/rules.d/00-teensy.rules    (preferred location)
+#   or
+# /lib/udev/rules.d/00-teensy.rules    (req'd on some broken systems)
+#
+# To install, type this command in a terminal:
+#   sudo cp 00-teensy.rules /etc/udev/rules.d/00-teensy.rules
+#
+# After this file is installed, physically unplug and reconnect Teensy.
+#
+ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04*", ENV{ID_MM_DEVICE_IGNORE}="1", ENV{ID_MM_PORT_IGNORE}="1"
+ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789a]*", ENV{MTP_NO_PROBE}="1"
+KERNEL=="ttyACM*", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04*", MODE:="0666", RUN:="/bin/stty -F /dev/%k raw -echo"
+KERNEL=="hidraw*", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04*", MODE:="0666"
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04*", MODE:="0666"
+
+#
+# If you share your linux system with other users, or just don't like the
+# idea of write permission for everybody, you can replace MODE:="0666" with
+# OWNER:="yourusername" to create the device owned by you, or with
+# GROUP:="somegroupname" and mange access using standard unix groups.
+#
+# ModemManager tends to interfere with USB Serial devices like Teensy.
+# Problems manifest as the Arduino Serial Monitor missing some incoming
+# data, and "Unable to open /dev/ttyACM0 for reboot request" when
+# uploading.  If you experience these problems, disable or remove
+# ModemManager from your system.  If you must use a modem, perhaps
+# try disabling the "MM_FILTER_RULE_TTY_ACM_INTERFACE" ModemManager
+# rule.  Changing ModemManager's filter policy from "strict" to "default"
+# may also help.  But if you don't use a modem, completely removing
+# the troublesome ModemManager is the most effective solution.