Amazon Fire 7 2019 (amazon-mustang)
This device runs a Downstream kernel. Some UIs will not work, and most features (3D acceleration, audio, etc.) may be broken. |
![]() Amazon Fire 7 showing the weston demo UI | |
Manufacturer | Amazon |
---|---|
Name | Fire 7 (2019) |
Codename | amazon-mustang |
Released | 2019 |
Type | tablet |
Hardware | |
Chipset |
MediaTek MT8163V B |
CPU | 4x 1.3 GHz Cortex-A53 |
GPU | Mali-T720 MP2 |
Display | 600x1024 IPS |
Storage | 16 GB |
Memory | 1 GB |
Architecture | armv7 |
Software | |
Original software The software and version the device was shipped with. |
Android (Fire OS) 7.1.1 (Fire OS 6) |
Extended version The most recent supported version from the manufacturer. |
Android (Fire OS) |
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. |
4.9.77 |
Device package |
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Kernel package |
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Flashing It is possible to flash the device with pmbootstrap flasher . |
Partial
|
---|---|
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 |
Works
|
Screen Display works. Ideally with sleep mode and brightness control. |
Works
|
Touchscreen |
Works
|
Multimedia | |
3D Acceleration |
Untested
|
Audio Audio playback, microphone, headset and buttons. |
Broken
|
Camera |
Untested
|
Connectivity | |
WiFi |
Untested
|
Bluetooth |
Broken
|
Miscellaneous | |
FDE Full disk encryption and unlocking with unl0kr. |
Untested
|
USB OTG USB On-The-Go or USB-C Role switching |
Partial
|
Sensors | |
Accelerometer Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile |
Untested
|
Contributors
Maintainer
Users owning this device
- BlackEyedSquid (Notes: 16GB, amonet exploit)
- NoriTech (Notes: ported)
- ThatGeekZen
How to unlock bootloader
The bootloader can now be through a hardware method: https://forum.xda-developers.com/amazon-fire/orig-development/fire-7-2019-mustang-unbrick-downgrade-t3944365
How to enter flash mode
Press and hold
+Installation
Due to the fact that fastboot doesn't work even after using the amonet exploit, you will need to export the boot image and flash it with twrp. Then flash this dummy zip which will force twrp to reapply the amonet exploit.
Another option is exporting a flashable zip that can be flashed using twrp. Refer to Installation Guide for postmarketOS
Amonet
Amonet is an lk exploit used to boot an unsigned kernel. Sources of amonet are available here: https://github.com/xyzz/amonet/tree/mustang. This exploit is installed by a bootrom exploit. But probably some 2nd stage bootloader is a good idea.
Mainlining
There is some work on mt8163 mainline, for amazon-karnak, but it will be easy to get it on mustang. For now serial console and simplefb is working. Pwrap and pmic seems to be working. https://github.com/mt8163-mainline/linux
Device problems
- Mainline is not yet usable.
- Panfrost (driver for mali-t720) is wip, and not avalible in downstream (Merged in linux 5.2)
- This device use exploit due to locked bootloader. See #Amonet.
- This device's bl is not very good for running linux, due to it appends much of bad cmdline params, and some things in device tree.
Useful information
- Serial/UART
- 921600 baud 8N1
- RX & TX pads are on the back of the board clearly marked. A cheap RS232-to-USB will work.
Please approach with caution since the display flex cable (top center) is glued onto the board but the board can be flipped over while it is connnected.
See also
- pmaports!1263 Initial merge request