As I already explained in the Kubrick thread:
This is caused by flashing a diags image from a different device that contains some reference to ids from that different device.
The good news is that with
the latest jailbreak, you don't need to "Disable diagnostics" at all. It will be disabled by the jailbreak installer when it's finished.
Now you can enable "USB Device mode", copy the latest jailbreak and reboot Kindle (twice). The jailbreak will be (re)installed, diagnostics disabled and Kindle will reboot to main mode without human interaction.
Alternatively you can connect to Kindle via SSH and issue these commands to disable diagnostics:
Code:
rm /mnt/us/ENABLE_DIAGS
idme -d --bootmode main
sync
reboot