Until now, this is a message I always receive when I launch Mplayer :
Failed to open LIRC support. You will not be able to use your remote control
LIRC stands for Linux Infrared Remote Control. This technology is available if you have installed the Debian package lirc.
If you do not want to have error message related to any LIRC related problems, then, add the following line in your own Mplayer config file :
fool@localhost:~$ echo “nolirc=yes” >> ~/.mplayer/config