So what do you call Umapa's serving as a medium of Manjushri for Je Tsongkhapa?
I am not convinced with Lama Umapa it was a trance or channeling in the fashion of an oracle.
I think it is more like Umapa spoke to Manjushri, as two people sitting across from a table would speak to eachother, and then relayed
what he had heard to Lama Tsongkhapa. Certainly none of the accounts I have read indicate that he "channeled" Lama Tzongkhapa.
Certainly there seems no solid reason that LTK consulted Manjushri through oracular trance.
See here:http://www.lamayeshe.com/index.php?sect ... =bio&id=37
At the age of thirty-three he met with the remarkable Lama Umapa (dBu ma pa), who came to Tsang (gTsang) with the intention of studying with Tsongkhapa. Umapa had had a vision of Manjushri, the embodiment of enlightened wisdom, which had changed his life from that of a simple cowherd. As a result of this vision he took up practices related to Manjushri and eventually experienced Manjushri's constant presence.
Lama Umapa became Tsongkhapa's direct line of communication with Manjushri. They spent periods of retreat together during which Umapa conveyed to Tsongkhapa Manjushri's advice and responses to questions concerning the correct understanding of reality. Eventually Tsongkhapa himself experienced visions of Manjushri, who bestowed empowerments on him and gave him teachings.
And here- it says quite clearly that Lama Umapa received visions of Manjushri and asked questions. This is quite different from an oracle:http://www.berzinarchives.com/web/en/ar ... khapa.html
Tsongkhapa also went to study the practice of Manjushri Dharmachakra (‘Jam-dbyangs chos-kyi ‘khor-lo) and Madhyamaka with the Karma Kagyu Lama Umapa (Bla-ma dbu-ma-pa dPa’-bo rdo-rje). This great master had studied Madhyamaka with the Sakya tradition and, since childhood, had daily visions of Manjushri, who taught him one verse each day. Tsongkhapa and he became mutual teacher and disciple. Lama Umapa checked with Tsongkhapa to get confirmation that the teachings he received in his visions of Manjushri were correct. This is very important, since visions can be influenced by demons.
Together with Lama Umapa, Tsongkhapa did an extensive retreat on Manjushri. From this time onward, Tsongkhapa received direct instruction from Manjushri in pure visions and was able to receive from him answers to all his questions. Before this, he had to ask his questions to Manjushri through Lama Umapa.
See the words of Geshe Sonam Rinchen from LTWA here:http://books.google.nl/books?id=ctVXX43 ... pa&f=false
It indicates that Lama Umapa experienced the constant presence of Manjushri. Very different from oracles who experience the presence of a particular deity only during the "trance" state. In one biography I looked at it speaks of an initial vision of Manjushri where Umapa fainted- but that only occured once, and after that he seemed to actually meet Manjushri and speak to him. It never mentions Manjushri taking possession of Lama Umapa's physical body or "entering" him.
Denma Locho Rinpoche:http://mp.iltk.org/en/L2_S1_4_4.html
When Lama Tsongkhapa would ask him questions, Lama Umapa would ask Manjushri and then relay the response back to Lama Tsongkhapa. After some time Manjushri told Lama Umapa to send Lama Tsongkhapa into retreat, but Lama Umapa said that if he did so others would criticize him. Manjushri told him not to worry, but to send Lama Tsongkhapa into retreat.
In order to ensure my mind never comes under the power of the self-cherishing attitude,
I must obtain control over my own mind.
Therefore, amongst all empowerments, the empowerment that gives me control over my mind is the best,
and I have received the most profound empowerment with this teaching.
brtsal ba'i bkhra drin