OnePlus 8T (oneplus-kebab)

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OnePlus 8T
OnePlus 8T running postmarketOS with weston
OnePlus 8T running postmarketOS with weston
Manufacturer OnePlus
Name 8T
Codename oneplus-kebab
Released 2020
Category testing
Original software Android 11
Hardware
Chipset Qualcomm SM8250 (Snapdragon 865 5G)
CPU Octa-core Kryo 585 (1x2.84 GHz & 3x2.42 GHz & 4x1.8 GHz)
GPU Adreno 650
Display 1080x2400@120 AMOLED
Storage 128/256GB
Memory 8/12GB
Architecture aarch64
Features
USB Networking
Works
Flashing
Works
Touchscreen
Works
Display
Works
WiFi
Xwayland
FDE
Mainline
Battery
3D Acceleration
Accelerometer
Audio
Bluetooth
Camera
GPS
Mobile data
SMS
Calls
USB OTG
NFC



Contributors

Users owning this device


How to enter flash mode

When powered off:

  • Hold power button
    • If the device has USB plugged in: wait for the device to vibrate, otherwise it might boot to Qualcomm MSM Mode
  • Hold volume up and down

Installation

This device uses dynamic partitions which allows it to merge multiple partitions (including system) into one super partition. PostmarketOS' initramfs can't mount these logical partitions yet. We'll need to flash the rootfs directly onto the super partition.

You can try to dump your original super.img (if you want to restore your original Android installation later) by using

adb pull /dev/block/by-name/super super.img

Follow the postmarketOS porting/installation guide and use

pmbootstrap flasher flash_rootfs

to flash rootfs.

Before booting, you'll have to flash a image to your dtbo partition:

pmbootstrap flasher flash_dtbo

Note: the dtbo.img is only present after a rootfs or initramfs image generation.

Getting back to Android

Since flashing the rootfs overwrites the super partition you'll have to do some extra steps to return to a state where you can normally flash an Android ROM.

Use your backed-up super.img

Before flashing your super.img you'll have to convert it into an sparsed image that fastboot can read:

img2simg super.img super-s.img
fastboot flash super super-s.img

Ideally you should be able to boot back into Android after restoring boot and dtbo or after switching to an untouched slot. If Android doesn't boot up or you encounter long loading times, bad performance, missing firmware and spontaneous crashes you should try the following options.

Wipe your super partition using super_empty.img

super_empty.img is a small metadata file you can create with Google's own tools (more research needed) and automatically with the Android Build System. If you have an LineageOS build enviroment set-up you can generate it with

make dist

Wipe the super partition using

fastboot wipe-super super_empty.img

After that you'll be able to flash a LineageOS OTA package. If the partition sizes defined in LineageOS' super_empty.img don't fit your ROM's partitions or if you're still encountering glitches you can follow this guide.

Use MsmDownloadTool

(more testing required) These tools aren't officially distributed by either Qualcomm nor OnePlus and only work under Windows.

Follow this guide.

See also