MEDIA-TEK MT8166 / MT8766 • AARCH64

Lenovo Tab M7 (3rd Gen)

Custom postmarketOS edge system image featuring the Phosh touch environment, strictly optimized for tablet performance with zero cellular or telephony software (Calls, SMS/Chatty, Voicemail, and ModemManager removed).

Display & Splash 7.0" 1024x600 IPS Continuous simplefb handover
Digitizer FocalTech fts_ts I2C0 (0x38), EINT GPIO 0
RAM & Swap 2 GB LPDDR4x zram-init enabled
Kernel & Boot Linux 4.19.127 Android Boot Header v2

Deployment Artifacts

Download verified postmarketOS fastboot images ready to flash directly

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RECOMMENDED FOR FASTBOOT

Phosh Rootfs (Sparse Image)

lenovo-tb7306f-root.simg

Complete postmarketOS Phosh tablet root filesystem in Android Sparse format for rapid flashing to the userdata partition.

Size: 1.1 GB Format: Android Sparse ext4
Download Sparse Rootfs

Kernel & Initramfs Boot Image

boot.img

Android Boot Image Header v2 containing downstream Linux 4.19, pmOS initramfs, and verified MediaTek device tree.

Size: 20 MB Format: Android Boot v2
Download boot.img

AVB Security Bypass (VBMeta)

vbmeta_disabled.img

Disables Android Verified Boot 2.0 (AVB) dm-verity and hash tree verification checks (flags 0x3) for fastboot flashing.

Size: 4.0 KB Partition: vbmeta_a / vbmeta_b
Download vbmeta_disabled.img

Automated Fastboot Flasher

flash_pmos.sh

Automated bash deployment script for Linux and macOS clients. Detects current active A/B slot and flashes all partitions in order.

Size: 2.8 KB Platform: Bash / Fastboot
Download flash_pmos.sh

Raw Ext4 Rootfs Image

lenovo-tb7306f-root.img

Uncompressed raw ext4 filesystem image. Useful for loop-mounting on host to inspect or customize the rootfs.

Size: 1.5 GB Format: Raw ext4
Download Raw Rootfs

Mainline Device Tree (DTB)

mt8166-lenovo-tb7306f.dtb

Compiled upstream device tree for MediaTek MT8166 with PSCI SMP boot, GIC-v3 interrupt controller, and pinctrl.

Size: 4.1 KB Format: FDT Binary (v17)
Download Mainline DTB

Flashing Guide & Terminal Instructions

Execute these commands in your local terminal with the tablet connected via USB

fastboot-deploy.sh — local terminal
# 1. Boot tablet into Fastboot mode: # Power off tablet, then hold [Power] + [Volume Down] until Fastboot menu appears fastboot devices # 2. Unlock bootloader (if not previously unlocked, confirm on tablet LCD): fastboot flashing unlock # 3. Disable Android Verified Boot (AVB 2.0) verification: fastboot flash vbmeta vbmeta_disabled.img # 4. Flash postmarketOS Android Boot Header v2 image (Kernel + initramfs): fastboot flash boot boot.img # 5. Flash Phosh Tablet rootfs into the userdata partition: fastboot flash userdata lenovo-tb7306f-root.simg # 6. Reboot into postmarketOS: fastboot reboot

USB Network Debugging (CDC-NCM)

Upon boot, postmarketOS automatically exposes a USB Ethernet network interface. Connect via SSH over the USB-C cable:

ssh user@172.16.42.1
User: user
Password: 147147 (or user)
Host IP: 172.16.42.2

Tablet Memory Profile

Because the TB-7306F contains 2 GB of RAM, the following lightweighting measures have been pre-baked into the image:

  • No Phone Apps: Calls, Chatty, and Voicemail are completely excluded.
  • ModemManager Disabled: Modem scanning daemon is stopped on OpenRC.
  • zram-init Enabled: Dynamic compressed swap partition in RAM.
  • Phosh Shell: Clean Wayland compositor with touch gesture support.