Replying to myself: no, it's not permanently bricked.
Almost all the fastboot utilities I've found (windows and Linux) don't support PW2 because the unavailable drivers. All but one.
I managed to make Linux to talk to PW2's fastboot mode by installing Fastboot GUI (32bits). Here are some quick and dirty steps:
- Install Ubuntu 32 bits in a virtual machine (VirtualBox, for instance);
- Run this:
Code:
sudo apt-get install libmono-2.0-1
- Download and unzip Fastboot GUI - LINUX NATIVE.zip;
- On your fastboot mode PW2, hold power button for 15 seconds (bottom orange led will flash in about 10 seconds, screen will flash twice in 15 seconds);
- Plug the USB cable to your PW2;
- Go to VirtualBox machine configuration and filter the Amazon Kindle [0001] port to be available only to the Ubuntu's virtual machine.
- Run Fastboot GUI;
- Set variable bootmode to diags or main;
- Add set variable and reboot taks;
- Your PW2 is back.
Just to make sure, I did the flashboot bundle install twice and the above method made it come back everytime. So, it works for me.
Best,