When using LMMS on Linux using the default settings one large problem is apparent. At any moment the sound can become very very distorted. Sometimes restarting pulseaudio will fix it. Other times you will have to restart the computer. However, switching to SDL will ALWAYS solve this problem. SDL does take up a bit more resources, but it is manageable. I ran LMMS on SDL on a RPI without overclocking while running Chromium, Scratch, and a terminal window without a hitch.