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Amazon Echo Show 5 (amazon-cronos)

From postmarketOS Wiki
Amazon Echo Show 5 (2nd Gen, 2021 Release)
Second gen Echo Show 5
Second gen Echo Show 5
Manufacturer Amazon
Name Echo Show 5 (2nd Gen, 2021 Release)
Codename amazon-cronos
Model C76N8S
Released 2021
Type tablet
Hardware
Chipset MediaTek MT8163
CPU Quad-core 1.3 GHz Cortex-A53
GPU Mali-T720
Display 960x480
Storage 8 GB
Memory 1 GB
Architecture aarch64
Software
Original software
The software and version the device was shipped with.
Android (Fire OS) 7.1.2 (FireOS 6.5.3.1)
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
Features
Flashing
Whether it is possible to flash the device with pmbootstrap flasher.
Untested
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Untested
Battery
Whether charging and battery level reporting work.
Untested
Screen
Whether the display works; ideally with sleep mode and brightness control.
Untested
Touchscreen
Untested
Keyboard
Whether the built-in physical keyboard works.
Untested
Touchpad
Whether the built-in touchpad works.
Untested
Stylus
Untested
Multimedia
3D Acceleration
Untested
Built-in DVB
TV tuner/DVB device
Untested
Audio
Audio playback, microphone, headset and buttons.
Untested
Camera
Untested
Camera Flash
Untested
IR TX
Untested
IR RX
Untested
Connectivity
WiFi
Untested
Bluetooth
Untested
Ethernet
Untested
GPS
Untested
NFC
Near Field Communication
Untested
Modem
Calls
Untested
SMS
Untested
Mobile data
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
USB-A
Whether the full-sized USB-A port works.
Untested
USB OTG
USB On-The-Go or USB-C Role switching.
Untested
HDMI/DP
Video and audio output with HDMI or DisplayPort.
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
Haptics
Untested
Barometer
Sensor to measure air pressure
Untested
Power Sensor
Sensor to monitor current, voltage and power. Not fuel gauge!
Untested

Contributors

Users owning this device

  • R0rt1z2 (Notes: Unlocked with amonet)


How to enter flash mode

You need to unlock the bootloader using amonet: https://xdaforums.com/t/unlock-root-twrp-unbrick-amazon-echo-show-5-2nd-gen-2021-cronos.4772596/

The unlock provides a hacked fastboot mode, which is the one you must use for flashing. Stock fastboot will remain locked because of how the exploit works.

To access hacked fastboot mode, you have two options:

  • Run the boot-fastboot.sh script from the amonet package.
  • Hold the Mute button while booting, until you see => HACKED FASTBOOT mode...

To access TWRP / recovery mode, you can either:

  • Run the boot-recovery.sh script from the amonet package.
  • Press and hold Volume - and Mute while turning on the device.
Note NOTE: Because of the nature of the exploit, boot and recovery images require a microloader to be injected into the very first block. NEVER flash boot or recovery images from within the OS using tools like dd. You MUST to use either HACKED FASTBOOT mode or TWRP to flash boot and recovery images, since they'll automatially inject the microloader if required.

Hardware variants

Note WARNING: This device was manufactured during a period of resource constraints, resulting in multiple hardware variants with different display panels and components. Users may encounter slight differences between units.

The following information was extracted from the stock device trees:

Variant Device Tree Audio Codec Touch Panel Notes
Proto cronos_proto Realtek RT5616e Goodix GT9xx Prototype version
EVT cronos_evt Realtek RT5616e Goodix GT9xx Engineering validation
HVT cronos_hvt Realtek RT5616e Goodix GT9xx Highly accelerated life test
DVT cronos_dvt Realtek RT5616e Goodix GT9xx Design validation
DVT 3.1 cronos_dvt_3_1 TI TAS5805M Goodix GT9xx Switched to TI audio codec
DVT 3.2 cronos_dvt_3_2 Realtek RT5616 Goodix GT9xx RT5616 variant (non-e)
DVT 3.3 cronos_dvt_3_3 TI TAS5805M Goodix GT9xx TAS5805M with AP GPIO control
PVT cronos_pvt Realtek RT5616e Goodix GT9xx Production validation
PVT 4.1 cronos_pvt_4_1 TI TAS5805M Goodix GT9xx TAS5805M with AP GPIO control
PVT 4.2 cronos_pvt_4_2 Realtek RT5616 Goodix GT9xx RT5616 variant (non-e)
PVT 4.3 cronos_pvt_4_3 Maxim MAX98396 Goodix GT9xx Maxim audio codec variant

UART

UART access is available through the TP55 pad (RX). By default, kernel logs are not displayed to UART since this is disabled by LK. The baud rate is 921600.

However, with the exploit installed, you can forcefully enable them by flashing a custom MISC image. You can generate (and flash) this image using the following command(s):

dd if=/dev/zero of=misc-uart.bin bs=1 count=32
echo -ne "UART_PLEASE" | dd of=misc-uart.bin bs=1 seek=16 conv=notrunc
fastboot flash MISC misc-uart.bin

See also