I've tried to root the kindle following this: http://forum.xda-developers.com/show...php?t=2074565; but the process always went with errors, reporting that some files do not exist. I am using NixOS at the moment and I haven't seen Windows since 2000, so please don't send me to Windows-only rooting.
After that, I tried to install 2nd bootloader/recovery, following the guide: http://forum.xda-developers.com/show...php?t=2100963; but something went wrong. I got blue fire logo, but it never booted and was stuck on the "loading" screen. I let the battery go flat; then charged from the wall charger and booted into normal mode - that went OK.
I am wondering if I have chosen wrong files or made a device identification error?
I know the kindle was bought from Amazon in November 2012 on promotional offer. The device information is the following: system version 10.4.6_user_4620220. Serial number D026 A0A0 2464 01LW.