I was very happy with my LXDE running on my Dell XPS 13 until, a few days ago, I found myself confronted with a dialgue box that presented the choices "desktop" or "laptop". It was set to "desktop", but I thought to myself "gosh, that cannot be correct" and so I set it to "laptop" and forgot about it.
A while later I began to experience problems with massive lag and slowdowns that I had never experienced before. I thought they were related to other issues but I have since discovered that plugging my laptop into external power seems to cure the problem instantly, and so I am coming to realise that I inadvertently messed something up.
The problem is that I do not remember where this dialogue box arose nor (exactly) what it was controlling. Can anybody indicate what I might have messed with and how to rectify it? I'm sure the dastardly setting was within one or two clicks of the LXDE main menu.
(Preferences > Power Manager would seem to be an obvious candidate but it tosses up dialogue box about Xfce4-power-manager not being loaded which I do not recall seeing when I messed things up, and even if I choose to load it I later get an error message about being unable to connect to it.)