LG G3 Europe (lg-d855): Difference between revisions
→Links: Added link to service manual Tags: mobile edit mobile web edit |
Mainline kernel info |
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pmbootstrap flasher flash_kernel | pmbootstrap flasher flash_kernel | ||
fastboot flash boot /tmp/pmOS_export/boot_bumped.img-lg-d855</pre> | fastboot flash boot /tmp/pmOS_export/boot_bumped.img-lg-d855</pre> | ||
=== Links | |||
== lk2nd == | |||
To avoid the secure boot error and get lk2nd running, download lk2nd-msm8974.img from [https://github.com/msm8916-mainline/lk2nd/releases here] and remove the "SEANDROIDENFORCE" <code>53 45 41 4E 44 52 4F 49 44 45 4E 46 4F 52 43 45</code> bytes at the end of the file with a hex editor, then bump lk2nd-msm8974.img with [https://raw.githubusercontent.com/LineageOS/android_device_lge_g3-common/lineage-18.1/bump/bump.py this] script and flash it to the phone with <code>fastboot flash boot lk2nd-msm8974.img</code>. If the bytes haven't been removed, the script will think that lk2nd has already been bumped. | |||
== Mainline kernel == | |||
List of features working on mainline kernel: | |||
* Volume Up/Down and Power keys | |||
* USB in peripheral mode | |||
* simple framebuffer | |||
* WLAN | |||
* Bluetooth | |||
* Touchscreen | |||
* eMMC | |||
* Haptics | |||
== Links == | |||
* [https://github.com/LineageOS/android_kernel_lge_g3 Original Kernel Source] | * [https://github.com/LineageOS/android_kernel_lge_g3 Original Kernel Source] | ||
* [https://archive.org/details/pdfy-my-nsbypVPlAMPeB Service manual (containing lots of schematics!)] | * [https://archive.org/details/pdfy-my-nsbypVPlAMPeB Service manual (containing lots of schematics!)] | ||
* [https://github.com/archeYR/lg-d855-mainline Mainline kernel fork for d855] | |||
== Photos == | == Photos == |
Revision as of 05:00, 11 November 2022
![]() LG G3 running Weston demos | |
Manufacturer | LG |
---|---|
Name | G3 (Europe) |
Codename | lg-d855 |
Released | 2014 |
Hardware | |
Chipset | Qualcomm MSM8974AC Snapdragon 801 |
CPU | Quad-core 2.5 GHz Krait 400 |
GPU | Adreno 330 |
Display | 1440x2560 IPS |
Storage | 16/32 GB |
Memory | 2/3 GB |
Architecture | armv7 |
Software | |
Original software | Android 4.4.2 on Linux 3.10 |
postmarketOS | |
Category | testing |
Pre-built images | no |
Flashing |
Partial |
---|---|
USB Networking |
Works |
Internal storage |
No data |
SD card |
No data |
Battery |
No data |
Screen |
Works |
Touchscreen |
Works |
Multimedia | |
3D Acceleration |
No data |
Audio |
No data |
Camera |
No data |
Camera Flash |
No data |
Connectivity | |
WiFi |
No data |
Bluetooth |
No data |
GPS |
No data |
NFC |
No data |
Modem | |
Calls |
No data |
SMS |
No data |
Mobile data |
No data |
Miscellaneous | |
FDE |
No data |
USB OTG |
No data |
HDMI/DP |
No data |
Sensors | |
Accelerometer |
No data |
Magnetometer |
No data |
Ambient Light |
No data |
Proximity |
No data |
Hall Effect |
No data |
Haptics |
No data |
Barometer |
No data |
Contributors
- Nutcake
Fastboot
Before you can use fastboot on this device you need to remove LGs Download mode, which hides the standard fastboot mode. You can do this by zeroing out a partition called 'laf':
adb shell
su
dd if=/dev/block/platform/msm_sdcc.1/by-name/laf of=/sdcard/laf.img #backup LGs Download mode to the internal SD just in case
dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/laf #Overwrite laf with zeroes, enabling fastboot
exit
adb reboot bootloader #reboot directly to fastboot
More detailed instructions for this can be found here
Afterwards, you can boot into fastboot by following these steps:
1. Turn of phone completely 2. Hold Volume Up. 3. Plug in USB-cable while still holding Vol. Up until fastboot pops up
Signing the boot image
pmbootstrap will successfully flash rootfs and kernel, however the device will only boot if you use the
pmbootstrap flasher boot
command, as it will otherwise show this error:
ERROR : boot certification verify [630]_________________________________________ [640] [640] Secure booting Error! [640] Cause : boot certification verify [640] [640]_________________________________________
The message is shown for 3 seconds, then the screen blacks out and the LED will blink red and blue indefinitely.
This happens because the bootloader on the d855 variant of the LG G3 can not be unlocked and you have to trick the bootloader into thinking your boot image is legitimate.
To do this, you need to first export your boot.img-lg-d855:
mkdir -p /tmp/pmOS_export pmbootstrap export /tmp/pmOS_export
Then we need a tool called Open_Bump, which can sign boot images for our device. (Requires Python 2. Also works for older LG devices?):
git clone https://github.com/CyboLabs/Open_Bump cd Open_Bump python2 open_bump.py "/tmp/pmOS_export/boot.img-lg-d855"
This will create a signed image called boot_bumped.img-lg-d855
in /tmp/pmOS_export/
.
Now first flash System and kernel images using pmbootstrap and then manually flash the signed image over these:
pmbootstrap flasher flash_rootfs pmbootstrap flasher flash_kernel fastboot flash boot /tmp/pmOS_export/boot_bumped.img-lg-d855
lk2nd
To avoid the secure boot error and get lk2nd running, download lk2nd-msm8974.img from here and remove the "SEANDROIDENFORCE" 53 45 41 4E 44 52 4F 49 44 45 4E 46 4F 52 43 45
bytes at the end of the file with a hex editor, then bump lk2nd-msm8974.img with this script and flash it to the phone with fastboot flash boot lk2nd-msm8974.img
. If the bytes haven't been removed, the script will think that lk2nd has already been bumped.
Mainline kernel
List of features working on mainline kernel:
- Volume Up/Down and Power keys
- USB in peripheral mode
- simple framebuffer
- WLAN
- Bluetooth
- Touchscreen
- eMMC
- Haptics
Links
- Original Kernel Source
- Service manual (containing lots of schematics!)
- Mainline kernel fork for d855