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OnePlus 8T (oneplus-kebab)

From postmarketOS Wiki
OnePlus 8T
OnePlus 8T running postmarketOS with weston
OnePlus 8T running postmarketOS with weston
Manufacturer OnePlus
Name 8T
Codename oneplus-kebab
Released 2020
Type handset
Hardware
Chipset Qualcomm Snapdragon 865 5G (SM8250)
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
Software
Original software
The software and version the device was shipped with.
Android 11
Extended version
The most recent supported version from the manufacturer.
Android
postmarketOS
Category testing
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
yes
pmOS kernel
The kernel version that runs on the device's port.
4.19.110
Device package device-oneplus-kebab
Kernel package linux-postmarketos-qcom-sm8250
Features
Flashing
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
Charging and battery level reporting works
Untested
Screen
Display works. Ideally with sleep mode and brightness control.
Works
Touchscreen
Works
Multimedia
3D Acceleration
Untested
Audio
Audio playback, microphone, headset and buttons.
Untested
Camera
Untested
Connectivity
WiFi
Untested
Bluetooth
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 OTG
USB On-The-Go or USB-C Role switching
Untested
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Untested

Contributors

Users owning this device

  • 9lore (Notes: pmOS mainline shenanigans)
  • Alfredohno (Notes: Android daily driver, 12/256 KB2003)
  • Archimax (Notes: Android daily driver, 12GB/256GB, running stock firmware. (KB2005))
  • Bdju (Notes: Android primary)
  • Coloneyescolon
  • EspiDev (Notes: 12/256 GB Android daily driver)
  • Frieder.Hannenheim (Notes: Slowly working on mainlining)
  • Kcxt (Notes: mainline dev)
  • Treier57lol (Notes: Android daily driver)
  • Uclydde (Notes: 12GB/256GB, KB2005 variant)


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