Amazon Fire HD 8 2018 (amazon-karnak)
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| This device runs a Downstream kernel. Some UIs will not work, and most features (3D acceleration, audio, etc.) may be broken. | 
|  Fire HD 8 running stock FireOS | |
| Manufacturer | Amazon | 
|---|---|
| Name | Fire HD 8 (2018) | 
| Codename | amazon-karnak | 
| Released | 2018 | 
| Type | tablet | 
| Hardware | |
| Chipset | MediaTek MT8163 | 
| CPU | Quad-core 1.3 GHz Cortex-A53 | 
| GPU | Mali-T720MP2 | 
| Display | 800 x 1280 | 
| Storage | 16 or 32 GB | 
| Memory | 1.5 GB | 
| Architecture | aarch64 | 
| Software | |
| Original software The software and version the device was shipped with. | Android 7.1.2 (FireOS 6.3.0) | 
| Extended version The most recent supported version from the manufacturer. | Android | 
| FOSS bootloader | no | 
| postmarketOS | |
| Category | downstream | 
| 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. | 3.19.0 | 
| Device package |  device-amazon-karnak | 
| Kernel package |  linux-amazon-karnak | 
| Flashing Whether it is possible to flash the device with  pmbootstrap flasher. | Works | 
|---|---|
| USB Networking After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system). | Works | 
| Battery Whether charging and battery level reporting work. | Untested | 
| Screen Whether the display works; ideally with sleep mode and brightness control. | Partial | 
| Touchscreen | Untested | 
| Multimedia | |
| 3D Acceleration | Untested | 
| Audio Audio playback, microphone, headset and buttons. | Untested | 
| Camera | Untested | 
| IR TX | Untested | 
| Connectivity | |
| WiFi | Untested | 
| Bluetooth | Untested | 
| NFC Near Field Communication | Untested | 
| Miscellaneous | |
| FDE Full disk encryption and unlocking with unl0kr. | Untested | 
| USB OTG USB On-The-Go or USB-C Role switching. | Untested | 
| Sensors | |
| Accelerometer Handles automatic screen rotation in many interfaces. | Untested | 
| Magnetometer Sensor to measure the Earth's magnetism | Untested | 
| Ambient Light Measures the light level; used for automatic screen dimming in many interfaces. | Untested | 
| Proximity | Untested | 
| Hall Effect Measures magnetic fields; usually used as a flip cover sensor | Untested | 
Contributors
- BenTheTechGuy
Users owning this device
- BenTheTechGuy (Notes: Researching mainline)
- Cdde (Notes: Running PMOS)
- Fumiya
- GloomyJD (Notes: Works, horrible condition)
How to enter flash mode
- Your bootloader must be unlocked via this method: https://forum.xda-developers.com/t/unlock-root-twrp-unbrick-fire-hd-8-2018-karnak-amonet-3.3963496/
- PMOS needs to be flashed using TWRP instead of fastboot so the boot.img can be patched with the amonet exploit.
- TWRP can be reached by holding and at boot.
Installation
pmbootstrap init pmbootstrap install --android-recovery-zip --recovery-install-partition=data # Make sure you're booted into TWRP at this point pmbootstrap flasher --method=adb sideload