Comment 7 for bug 1434774

ways to open by command line:
 * lxterminal -e alsamixer
 * x-terminal-emulator -e alsamixer
 * xterm alsamixer (or xterm -e alsamixer)

what will not work:
 * lxsession-default terminal alsamixer
 * lxsession-default terminal -e alsamixer
 * lxsession-default terminal "-e alsamixer"

I did set xterm as x-terminal-emulator and it still failed, so my suspicion is that lxsession-default-terminal is being used to make the call, which can't handle parsing the -e switch, apparently.