I decided to look into this whole Kundalini/Kundabuffer question some more. From reading this thread and previous discussions on this topic, it seems like nobody had a clear idea on what exactly Gurdjieff was talking about.
It has been posted before, but I think it is a good idea to look again at what Gurdjieff said about Kundalini:
"In so-called 'occult' literature you have probably met with the expression 'Kundalini,' 'the fire of Kundalini,' or the 'serpent of Kundalini.' This expression is often used to designate some kind of strange force which is present in man and which can be awakened. But none of the known theories gives the right explanation of the force of Kundalini. Sometimes it is connected with sex, with sex energy, that is with the idea of the possibility of using sex energy for other purposes. This latter is entirely wrong because Kundalini can be in anything.
And above all, Kundalini is not anything desirable or useful for man's development. It is very curious how these occultists have got hold of the word from somewhere but have completely altered its meaning and from a very dangerous and terrible thing have made something to be hoped for and to be awaited as some blessing.
In reality Kundalini is the power of imagination, the power of fantasy, which takes the place of a real function. When a man dreams instead of acting, when his dreams take the place of reality, when a man imagines himself to be an eagle, a lion, or a magician, it is the force of Kundalini acting in him. Kundalini can act in all centers and with its help all the centers can be satisfied with the imaginary instead of the real. A sheep which considers itself a lion or a magician lives under the power of Kundalini.
Kundalini is a force put into men in order to keep them in their present state. If men could really see their true position and could understand all the horror of it, they would be unable to remain where they are even for one second. They would begin to seek a way out and they would quickly find it, because there is a way out; but men fail to see it simply because they are hypnotized. Kundalini is the force that keeps them in a hypnotic state. 'To awaken' for man means to be 'dehypnotized.' In this lies the chief difficulty and in this also lies the guarantee of its possibility, for there is no organic reason for sleep and man can awaken."
From: 'In Search Of The Miraculous' by P.D.Ouspensky
I think that we need to keep in mind that Gurdjieff is criticizing a very specific definition of 'Kundalini' - the one that was prevalent among occultists in the first half of the 20th century.
Specifically, he talks about "how these occultists have got hold of the word from somewhere but have completely altered its meaning".
Now, this "getting hold of the word somewhere" does
not sound like he is talking about the actual traditions in India where the word Kundalini comes from.
What I do not understand is why he puts the label 'Kundalini' on what he describes as the "power of fantasy and illusion, which can replace a true function".
So maybe there is some connection between illusion and the Kundalini energy. Yet from what I have read so far, Gurdjieff seems to be literally the only one talking about it.