Hi geekmaster and whoever, thanks for the quick reply. I have contacted amazon and they arranged to ship me a new one. Of course, I need to return the present one.
I have to admit amazon has a nice service.
To geekmaster:
I tried to mount it normally or under recovery mode, the internal flash driver has 3.3GB free space, so I guess the system didn't mount the driver correctly. Maybe it has been linked to another place or failed to mount the /mnt/us partition?
I have checked the source code of jailbreak and font hack. They did quite a good job and everything they did is clear. However, the Duokan team didn't provide their code and I can't figure out what they did.
I have read several posts of the same problem. All of them have Duokan installed. My thought is it's should be related to the Duokan system. I posted the question on duokan's forum, but no reply yet. ( I still like Duokan as it has several useful functions, e.g. support djvu files.)
To whoever：
I regret for haven't noticing Yifan's interesting post about update and recovery kernel of dxg before. I will do that when I got my new kindle dxg and I am doing it now for my kindle3.
