I tried mdev and it works.
I get a serial console where I can login, but as soon as I plug in the usb the kernel oopses.
see
kernel-oops-2014-06-17.txt.
I'm using the original kobo kernel from my other KT SD-card as well as the uboot and whatever from the unpartitioned area.
I am now out of ideas, again.
I'm not really firm in the ways of the linux kernel.
Regards
Aydan