Any of the "upstream" kernels stopped working after the registers were printed on the screen, i.e. before switching to the linux console).
Maybe you can try to disable serial port driver.Sorry that Lemote's staffs are now in vacation and I have no 2E box at hand too. Will try later.
This kernel http://git.debian.org/?p=users/zobel/linux-loongson.git;a=commit;h=e0ebe189339abf3ecc5c80f262f46395446bbf32 boots (with http://alius.ayous.org/~aba/config-2.6.31.6-dsa-mipsel-lemote ) but stops while building binutils (even if built with the patched binutils). I need to admit that I don't have any idea what I could do or try. Cheers, Andi