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Thread: Using Griffin Powermate in Linux

  1. #1
    Newbie JustinNoel's Avatar
    Join Date
    Jan 2011
    Location
    Boston, MA, USA
    Posts
    14

    Using Griffin Powermate in Linux

    I've got my Griffin Powermate working under Linux it was pretty easy. Here is the procedure. If files don't exists already create them.

    1) Add correct permissions for the new device. Add this to /etc/udev/rules.d/40-permissions.rules.
    Make sure you add the specified group to /etc/group and add yourself and other X users to it. Otherwise use some group all GUI users are a member of.
    Code:
    ATTRS{product}=="Griffin PowerMate" GROUP="powermate", MODE="0666"
    2) Install .deb or build source from
    http://www.bedroomlan.org/projects/evrouter

    3) Add ~/.evrouterrc to your home dir with the following contents
    Code:
    Window ""
    "Griffin PowerMate" "" any key/256 "XKey/XF86AudioMute"
    "Griffin PowerMate" "" any rel/7/1 "XKey/XF86AudioRaiseVolume"
    "Griffin PowerMate" "" any rel/7/-1 "XKey/XF86AudioLowerVolume"
    4) Start evrouter when users log into X by adding this to /etc/X11/xinit.d/evrouter
    Code:
    evrouter /dev/input/by-id/usb-Griffin_Technology__Inc._Griffin_PowerMate-event-if00
    Of course this requires the knob to be attached at login time. A hotplug script would be necessary to load evrouter on demand.
    Justin Noel
    Senior Software Engineer
    ICS
    http://www.ics.com

  2. #2
    Maximum Bitrate nasa's Avatar
    Join Date
    Aug 2006
    Location
    PA
    Posts
    696
    Hi,

    I don't have one of these... However, using what you posted - below is a simple udev rule to try.

    BUS="usb", KERNEL="event*", ATTRS{product}="Griffin PowerMate", SYMLINK+="input/powermate" run+="/usr/local/bin/evrouter_start"


    where evrouter_start is something like:

    #!/bin/bash
    evrouter /dev/input/powermate


    With this remove step #4, and now things should be on demand...

  3. #3
    Newbie
    Join Date
    Jul 2012
    Posts
    1
    Thanks for sparing me the legwork of reading this dudes mind.

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