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bpi-update broken on bpi-m2p - suggests kernel downgrade to 3.x, breaks bpi-hw and breaks GPIO

Basics

Board model Banana Pi M2+ V1.2

Armbian Bionic and Stretch is used and supported as per your documentation.

Armbian_5.90_Bananapim2plus_Ubuntu_bionic_next_4.19.57.img
Armbian_5.83_Bananapim2plus_Debian_stretch_next_4.19.38.img

This ticket is using Bionic as example, but same happens on Stretch.

Installing and booting from eMMC

  • Burn img to SD card
  • Place SD card into BPI
  • Boot into BPI
  • scp' image Armbian_5.90_Bananapim2plus_Ubuntu_bionic_next_4.19.57 to BPI SD card
  • Burn image to eMMC
  • sudo dd if=Armbian_5.90_Bananapim2plus_Ubuntu_bionic_next_4.19.57.img of=/dev/mmcblk1 bs=10MB
  • halt
  • Remove SD card
  • Boot (boots from eMMC)
  • Change root password
  • Ctrl+C (abort) Armbian suggestion for user creation, only user root for now and everything following is done as root.
uname -a
Linux bananapim2plus 4.19.38-sunxi #5.83 SMP Fri May 3 23:33:25 CEST 2019 armv7l GNU/Linux

apt update
apt upgrade
reboot

uname -a
Linux bananapim2plus 4.19.62-sunxi #5.92 SMP Wed Jul 31 22:07:23 CEST 2019 armv7l GNU/Linux

bpi-tools routine

Install bpi-tools

apt -y install file && \
mkdir -p ~/sources/bpi-tools && cd "$_" && \
curl -sL https://github.com/BPI-SINOVOIP/bpi-tools/raw/master/bpi-tools | sudo -E bash -  && \
bpi-tools  && \
bpi-tools -v && \
bpi-hw

Check output-01.log

  • Has warning /usr/bin/bpi-hw: line 241: warning (..)
  • bpi-hw returns bpi-m2p as expected.

bpi-update routine

Let us use bpi-update

mkdir -p ~/sources/bpi-update && cd "$_" && \
bpi-update -c bpi-m2p.conf

Check output-02.log

root@bananapim2plus:~/sources/bpi-update# ls -la
total 116640
drwxr-xr-x 2 root root     4096 Aug  6 22:55 .
drwxr-xr-x 4 root root     4096 Aug  6 22:55 ..
-rw-r--r-- 1 root root 89174038 Aug  6 22:55 3.4.39-BPI-M2P-Kernel.tgz
-rw-r--r-- 1 root root  3157772 Aug  6 22:55 BOOTLOADER-bpi-m2p.tgz
-rw-r--r-- 1 root root  6709073 Aug  6 22:55 BPI-BOOT-bpi-m2p.tgz
-rw-r--r-- 1 root root    42020 Aug  6 22:55 addons.tgz
-rw-r--r-- 1 root root     1803 Aug  6 22:55 bpi-m2p.conf
-rw-r--r-- 1 root root  1221842 Aug  6 22:55 bpi-service.tgz
-rw-r--r-- 1 root root    16808 Aug  6 22:55 bpi-tools.tgz
-rw-r--r-- 1 root root  4124902 Aug  6 22:55 brcm.tgz
-rw-r--r-- 1 root root    11673 Aug  6 22:55 bt.tgz
-rw-r--r-- 1 root root  7166367 Aug  6 22:55 camera-apps.tgz
-rw-r--r-- 1 root root  7709185 Aug  6 22:55 camera.tgz
-rw-r--r-- 1 root root    67927 Aug  6 22:55 libvdpau_sunxi.tgz

Downgrade to 3.4.39 kernel?

At this point simply reboot (without touching bpi-bootsel)

Let's check what bpi-hw says

root@bananapim2plus:~# bpi-hw
bpi-m3
root@bananapim2plus:~# uname -a
Linux bananapim2plus 4.19.62-sunxi #5.92 SMP Wed Jul 31 22:07:23 CEST 2019 armv7l GNU/Linux

bpi-hw reports incorrect board version

GPIO after bpi-update routine

Extra mention.

If bpi-update routine is skipped, after installing your RPi.GPIO fork...

apt install python-dev python3-dev
mkdir -p ~/sources && cd "$_" && \
git clone https://github.com/BPI-SINOVOIP/RPi.GPIO && \
cd RPi.GPIO && \
python3 setup.py install && \
python2 setup.py install

...at least polling GPIO was possible (interrupts do not work for your fork). After bpi-update routine is applied (bpi-update -c bpi-m2p.conf ...) GPIO does not work.

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