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Amazon Kindle 4 (amazon-yoshi)

From postmarketOS Wiki
Amazon Kindle 4
File:amazon-yoshi.jpg
Manufacturer Amazon
Name Kindle 4
Codename amazon-yoshi
Released 2011
Type ebook reader
Hardware
Chipset Freescale
NXP i.MX508
CPU 800MHz ARM Cortex A8
GPU ePXP+EPDC
Display 6-inch (150 mm²), 600 × 800 pixels, 167 PPI density, 16-level grayscale
Storage 2 GB
Memory 256 MB
Architecture armv7
Software
Original software
The software and version the device was shipped with.
Kindle OS
Extended version
The most recent supported version from the manufacturer.
Kindle OS
postmarketOS
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
no
pmOS kernel
The kernel version that runs on the device's port.
5.15-rc6
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Broken
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Broken
Battery
Charging and battery level reporting works
Broken
Screen
Display works. Ideally with sleep mode and brightness control.
Broken
Touchscreen
Untested
Multimedia
3D Acceleration
Broken
Audio
Audio playback, microphone, headset and buttons.
Broken
Camera
Untested
Connectivity
WiFi
Broken
Bluetooth
Broken
GPS
Untested
NFC
Near Field Communication
Broken
Modem
Calls
Untested
SMS
Untested
Mobile data
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Broken
USB OTG
USB On-The-Go or USB-C Role switching
Broken
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Broken

Contributors

  • samcday

Users owning this device

  • Illen (Notes: Kindle 5 Classic, damaged panel)
  • Jacobk (Notes: stock firmware, with ads)
  • Samcday
  • Werti (Notes: 2x (both stock, one with broken screen))


How to enter flash mode

  • Jailbreak your device by following the Kindle4NTHacking Jailbreak guide from MobileRead wiki.
  • Follow the instructions on the Kindle4NTHacking page to set up USBnet and obtain a root shell.
  • Write the image to main partition:
cat /tmp/postmarketOS-export/amazon-yoshi.img | ssh -oHostKeyAlgorithms=+ssh-rsa -oKexAlgorithms=+diffie-hellman-group1-sha1 root@192.168.15.244 "dd of=/dev/mmcblk0p1 bs=512"
  • Reboot into fastboot mode:
idme -d --bootmode fastboot
reboot
./fastboot flash kernel /tmp/postmarketOS-export/uImage && ./fastboot setvar bootmode main && ./fastboot reboot
  • Congratulations, you now have a much less useful e-reader device. But it's running mainline Linux, so there's that at least!

Installation

See also