Lenovo Yoga Tab 3 10 LTE/WiFi (lenovo-lxf-p5100)

Features
Flashing Whether 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).	Broken
Internal storage eMMC, SD cards, UFS...	Works
SD card Also includes other external storage cards.	Works
Battery Whether charging and battery level reporting work.	Partial
Screen Whether the display works; ideally with sleep mode and brightness control.	Partial
Touchscreen	Partial
Stylus	Partial
Multimedia
3D Acceleration	Partial
Audio Audio playback, microphone, headset and buttons.	Broken
Camera	Broken
Connectivity
WiFi	Works
Bluetooth	Works
GPS	Untested
Modem
Calls	Broken
SMS	Broken
Mobile data	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 Handles automatic screen rotation in many interfaces.	Broken

Lenovo Yoga Tab 3 10 LTE
Manufacturer	Lenovo
Name	Yoga Tab 3 10 LTE
Codename	lenovo-lxf-p5100
Model	yt3-x50y; yt3-x50l; yt3-x50m
Released	2016
Type	tablet
Hardware
Chipset	Qualcomm Snapdragon 210 (MSM8909)
CPU	Quad-core 1.3 GHz Cortex-A7
GPU	Adreno 304
Display	800x1280 10.1" IPS LCD
Storage	16/32 GB
Memory	2 GB
Architecture	armv7
Software
Original software The software and version the device was shipped with.	Android 5.1
Extended version The most recent supported version from the manufacturer.	Android 6
postmarketOS
Category	testing
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	yes
Generic port	Generic MSM8909 (qcom-msm8909)
Device package	device-qcom-msm8909
Kernel package	linux-postmarketos-qcom-msm8916
Initial MR Initial merge request.	pmaports!6128

Lenovo Yoga Tab 3 10 WiFi
Manufacturer	Lenovo
Name	Yoga Tab 3 10 WiFi
Codename	lenovo-lxf-p5100
Model	yt3-x50f
Released	2016
Type	tablet
Hardware
Chipset	Qualcomm Snapdragon 212 (APQ8009)
CPU	Quad-core 1.3 GHz Cortex-A7
GPU	Adreno 304
Display	800x1280 10.1" IPS LCD
Storage	16/32 GB
Memory	2 GB
Architecture	armv7
Software
Original software The software and version the device was shipped with.	Android 5.1
Extended version The most recent supported version from the manufacturer.	Android 6
postmarketOS
Category	archived
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	no
Generic port	Generic MSM8909 (qcom-msm8909)
Device package	device-qcom-msm8909
Kernel package	linux-postmarketos-qcom-msm8916
Initial MR Initial merge request.	pmaports!6128

This device is supported as part of a generic port. Refer to Generic MSM8909 (qcom-msm8909) for installation instructions and more information.

This device has been archived. This means that it no longer appears in pmbootstrap and is likely broken.
It can still be selected in pmbootstrap init by typing in the vendor and codename, but you will have to build the kernel package manually.

This device is supported as part of a generic port. Refer to Generic MSM8909 (qcom-msm8909) for installation instructions and more information.

The Lenovo Yoga Tab 3 10 LTE/WiFi is an interesting tablet that has a stand. There are QR code stickers on the motherboard with a codename printed on them. All codename variants begin with the lxf_p5100 prefix and may have different suffixes:

_B01: Model Name yt3-x50m, LTE Variant
_J01: Model Name yt3-x50l, LTE Variant
_L01: Model Name yt3-x50f, Wi-Fi Variant

How to enter flash mode

Fastboot: Press and hold Power+Volume Down until the Lenovo logo shows up. Alternatively, run adb reboot bootloader. Depending on your firmware, you might see a tux logo or the Android robot instead.
EDL: Press and hold Power+Volume Up while connecting the device to a computer with a USB cable.

How to unlock the bootloader

Go to Settings → About device
Tap the build number 7 times to enable Developer options
In Developer options, enable "Allow bootloader to be unlocked"
Boot to fastboot mode and run fastboot oem unlock-go
Wait until it has wiped everything in the userdata partition.

Installation

🚧	This page is a work-in-progress. Some information contained within may be inaccurate or incomplete.

lk2nd is a secondary bootloader that provides a standard fastboot interface, which can be used to boot postmarketOS without Android boot flashed or pmbootstrap flasher flash_kernel.

Download lk2nd-msm8909.img from Releases page on Github.
Boot your phone to bootloader (fastboot) mode.
Follow lk2nd instructions to install lk2nd. Basically flash it to the boot partition (fastboot flash boot lk2nd-msm8909.img)
Follow Qualcomm_Snapdragon_410/412_(MSM8916)#Installation to install postmarketOS.

Note: Enter lk2nd fastboot mode by pressing Volume Down after booting (this time wait until it vibrates then press Volume Down!

Table of hardware

Feature	Components	Status	Driver	Note
Display	MDP 3 Panel: boent35523b_800p, auoOTM1287A_800p	P	N	Works with simple-framebuffer. There is no panel driver upstream, but it can be generated from the downstream code.
GPU	Adreno 304	P	P	See MSM8909#Adreno
Wi-Fi	Qualcomm WCN3620	Y	Y	This chip is found in many MSM8909 and MSM8916 devices.
Bluetooth		Y	Y
FM		?	?
Modem		?	?
Audio Codec		N	N
Charger	smb358 Charger	N	Y	This IC handles USB power out/mode switching and is supported upstream. See [1]
Power management	pm8909	Y	Y
Battery Temperature Sensor	pm8909	?	?	It is connected to PM8916. Also, the only current developer's unit lack of Battery Temperature Sensor. (See the BAT_TEMP pin at below) Untested, but it seems that mainline lacks a temperature sensor driver?
Fuel Gauge	bq27xxx	Y	Y	See [2]
Rear Camera		N	N
Front Camera		N	N
Magnetometer	AKM AK09911	Y	Y	Managed to get output via sysfs
Accelerometer	Bochs BMA223	N	N	No Mainline driver
Light Sensor	ELAN EPL2102	N	N	lack of mainline driver,rare chip
Touchscreen/Stylus	hideep-ts-i2c	P	P	It seems the kernel driver doesn't work with some of the touchscreens that come with the device. There are issues in userspace (See libinput#1046)
Buttons	Gpio button/pm8941-resin/pm8941-pwrkey	Y	Y
LEDs	sn3191	P	Y	Power LED Doesn't work due to sensors occupying the I²C bus. It's possible to get it to work by removing the sensors from the device tree.
USB Controller/PHY	ChipIdea USB Controller / Qualcomm USB HS PHY	P	Y	See [3]
Modem	MSM8909 Modem	N	N	Untested, but it has no mainline driver.

Test pins

There are many soldering point/test pins on the motherboard, most of which are labelled.

Some of the pins found in the motherboard:
Label	Component	Description
BAT_TEMP	Battery	Battery temperature sensor
VBAT+	Battery	Battery positive
GND	Battery	Battery ground
SCL	Touchscreen/Fuel gauge	There are two such pins on the board: one near the battery socket for the fuel gauge's I²C bus, and one for the touchscreen's I²C bus.
SDA	Touchscreen/Fuel gauge	There are two such pins on the board: one near the battery socket for the fuel gauge's I²C bus, and one for the touchscreen's I²C bus.
PWR	Buttons	Power button
VOL+	Buttons	Volume up button
VOL-	Buttons	Volume down button
LEDR	LEDs	Power LED positive
DP	Micro-USB	Data Positive
DM	Micro-USB	Data Negative
VBUS	Micro-USB	USB Power positive
USB_ID	Micro-USB	Micro-USB USB_ID pin
Rx	UART	UART pin of Rx
Tx	UART	UART pin of Tx
VDD	Touchscreen	VDD pin of the touchscreen, its main power source
VID	Touchscreen	VDD pin of the touchscreen, the main IO voltage
INT	Touchscreen	Interrupt pin of the touchscreen, connected to the SoC's GPIO pin 13
RST	Touchscreen	Reset pin of the touchscreen, connected to the SoC's GPIO pin 12

Downstream

Missing device tree changes

Here are the search results from searching 800p in a folder that contains all the DTBs extracted from the stock Android kernel:

$ grep -rnw ./ -e '800p'
./13_dtbdump_Qualcomm_T
=echnologies,_Inc._MSM8909_QRD_SKUE.dtb:25729:zauoOTM1287A 800p video mode dsi panel
./13_dtbdump_Qualcomm_Technologies,_Inc._MSM8909_QRD_SKUE.dtb:26365:zboeNT35523B 800p video mode dsi panel
./35_dtbdump_Qualcomm_Technologies,_Inc._MSM8208_1GB_QRD_SKUE.dtb:25034:zauoOTM1287A 800p video mode dsi panel
./35_dtbdump_Qualcomm_Technologies,_Inc._MSM8208_1GB_QRD_SKUE.dtb:25670:zboeNT35523B 800p video mode dsi panel
./32_dtbdump_Qualcomm_Technologies,_Inc._MSM8208_QRD_SKUE.dtb:25033:zauoOTM1287A 800p video mode dsi panel
./32_dtbdump_Qualcomm_Technologies,_Inc._MSM8208_QRD_SKUE.dtb:25669:zboeNT35523B 800p video mode dsi panel
./05_dtbdump_Qualcomm_Technologies,_Inc._MSM8909_QRD_SKUE.dtb:25728:zauoOTM1287A 800p video mode dsi panel
./05_dtbdump_Qualcomm_Technologies,_Inc._MSM8909_QRD_SKUE.dtb:26364:zboeNT35523B 800p video mode dsi panel

According to that, boent35523b_800p and auoOTM1287A_800p are the panels used in the device.

However, those device trees won't appear when searching 800p in the kernel tree provided by Lenovo. The OEM has provided a kernel tree that lacks many of their device tree changes.

Gallery

Stock home screen
lk2nd boot
pmOS with Xfce4 on a downstream kernel

Contributors

Chaosleo07

Maintainers

exkc

Users owning this device

Exkc

External links

Vendor kernel source
Vendor kernel source repository (reuploaded to GitHub)
Normal TWRP (broken)
Unofficial TWRP with modifications (dead link)
Device info (WiFi variant)
Device info (LTE variant)
Schematics
DIY battery replacement with lithium-ion battery forum post (it has some info about the fuel gauge)