I'm still a bit busy at the moment, since I have to defend my PhD thesis this week. After next week I should have some more time to do all the stuff that I have been postponing.
Hopefully that includes software development for the iLiad
Anyways:
@atesta: I'm not sure whether it is possible to downgrade the firmware. Also, I think the 2.12.1 firmware version is specific for the Book Edition, so I'm not sure you should downgrade.
You could try to reflash the device, I think that resets it to an older firmware (which you are then supposed to update to the most recent version.
@iliad_fan: I could be mistaken but I think those files are not licensed under the GPL, and we're not allowed to redistribute them.
@UomoNero: You can post the ktrace.log. I'm not sure whether it'll enable me to solve your problem, but it's worth a try.