Some firmware versions do not allow the USB storage area to be accessible over USB unless the Kindle is registered.
A particular PITA is the firmware versions currently shipping on the KOA2 -
You have to be able to put the blocker directory name on USB storage to prevent an OTA update before you let the Kindle call home to register it. But you can't put anything on the USB storage until it is registered.
A significant problem with Kindles purchased as "gifts" during the up coming gift giving season.
This is one legitimate use of a fake registration file.
Use this RUNME.sh script (with *nix line endings, not Windows line endings) to install a temporary registration information file.
Note: This file will be removed anytime you contact with Amazon, so it should not interfere with registering the Kindle for real.
This also enables all menu entries, both main menu tree and settings menu tree.
Code:
#!/bin/sh
# If present, save current registration info file
[ -f /var/local/java/prefs/reginfo ] && cp /var/local/java/prefs/reginfo /mnt/us/reginfo.bak || true
# Add a fake registration file, format as for 5.9.2 and earlier
cat > '/var/local/java/prefs/reginfo' << EOF
givenName=Hacker
userId=amzn1.account.XXXXXXXX3AAA587YYYYYYYYYYYYY
deviceName=FakeReg
userName=Hacker
deviceEmailAddress=hacker@kindle.com
EOF
NOTE: You must reboot (restart with long press of power button) after running the above script.
Which results in (this is a PW3, fm 5.9.2):
Notice the device name above and in the upper left of the home screen:
