Provided by: lirc-x_0.10.1-5.2_amd64 bug


       xmode2 - Show the pulse/space length of infrared signals


       xmode2 [options]


       The  main purpose of xmode2 is to check operation of your home-brew LIRC receiver hardware
       and to see the IR waveform of the remote controller  without  an  expensive  oscilloscope.
       Very  useful  for  debugging. Of course this program won't work with hardware that decodes
       the signals  itself  like  e.g.  TV  cards  or  the  Irman  i.  e.,  it  only  works  with
       LIRC_MODE_MODE2 type drivers.

       xmode2  prints  a  simple  graphics  display  of the pulse/space lengths. It accepts a few
       commands including time base changes; see the xmode2 -h output.

       lirc-lsplugins(1) allows checking if a driver is a LIRC_MODE2 type one.


       -h --help
              display usage summary

       -v --version
              display version

       -d --device=device
              read from given device

       -H --driver=driver
              use given driver

       -m --mode
              enable alternative display mode

       -r --raw
              access device directly


       In many cases xmode2 needs to run as root to  access  devices  not  available  to  regular
       users.  On  the  other  hand,  running as root creates problems such as log files owned by
       root, security concerns etc.

       In order to cope with this, xmode2 by default drops  root  privileges  after  opening  the
       input device. This support is based on that root permissions are acquired using sudo(1) e.
       g., using

               $ sudo xmode2 --driver default --device /dev/lirc0

       If not  using  sudo,  the  same  behaviour  could  be  accomplished  using  the  SUDO_USER
       environment variable e. g.,

               # SUDO_USER=$LOGNAME xmode2 --raw /dev/lirc0

       The --keep-root option will make xmode2 keep it's root privileges for the complete run.


       Drivers  are  loaded  dynamically. The search path used for this is determined by (falling

       - The --plugindir option.

       - The 'plugindir' entry in  the [lircd] section of the lirc_options.conf file.

       - The environment variable LIRC_PLUGINDIR.

       - A hardcoded default (usually /usr/lib[64]/lirc/plugins).


           Debug output. Setting the XDG_CACHE_HOME environment variable relocates this  file  to



       The  documentation  for  lirc is maintained as html pages. They are located under html/ in
       the documentation directory.