Debian-Mobian Nexus 7 2012 wifi rev. E1565 kernel-5.15.0-rc4-next-20211011-postmarketos-grate

Debian Mobian Bookworm preimage f2fs rootfs kernel-5.14.0-rc3-next-20210918-grate
https://drive.google.com/drive/folders/1PgR3LVJa7UyHzY9PA_xc6XeCYpSkhLEI?usp=sharing

Debian Bulleye pre-image kernel-5.14.0-rc3-next-20210729-grate:
https://drive.google.com/drive/mobile/folders/1jhq1v5ejOazDB1wSF-ZS0FxBc_QIPUFD/1BL_ZPgsDuYTu5EXl0vXK6uyIeGmW5FbW?sort=13&direction=a

Vì mục đích testing Phosh Mobile Gnome-shell trên Nexus 7 2012 mà mình đã làm ra ubuntu 21.04 hirsute hippo, nhưng Phosh chưa chạy được nên build Debian để cài và thành công. Vì Phosh Mobile gnome-shell đã chạy trên N7 postmarketOS nhưng do quá ít ứng dụng cài nên mới thử trên distro khác xem có tiện lợi hơn không

***Cần có micro-usb keyboard để input trong command line

Cách kiểm tra Nexus 7 2012 là mã cũ PM269 hay E1565. Tham khao:
https://wiki.postmarketos.org/wiki/Google_Nexus_7_2012_(asus-grouper)

Google Nexus 7 2012 (asus-grouper) - postmarketOS

wiki.postmarketos.org

Variants

• grouper rev. PM269 - without GSM (oldest)
• grouper rev. E1565 - without GSM (modern revision)
• tilapia rev. E1565 - with GSM

Do I have grouper or tilapia?

TWRP (adb shell) $ grep androidboot.baseband=unknown /proc/cmdline && echo grouper || echo tilapia

Which hardware revision of grouper do I have?

TWRP (adb shell) $ find /sys/devices/ | grep -c max776 && echo You have E1565

TWRP (adb shell) $ find /sys/devices/ | grep -c tps6591 && echo You have PM269



Đặt máy về bootloader, để flash boot.img qua fastboot hoặc dùng method của postmarketOS. Kết nối Nexus 7 vào máy tính qua cáp usb chuẩn 1.0 → 2.0

# sudo adb start-server

# sudo adb reboot bootloader

# sudo fastboot flash boot <boot_filename>.img

Vào TWRP for grouper 3.3.1-0 trở lên https://dl.twrp.me/grouper/

Download TWRP for grouper

Download TWRP Open Recovery for grouper

dl.twrp.me

Dùng adb shell trên PC/laptop hoặc Advance/Terminal trong twrp để umount mmcblk0p9 (làm 2 lần cho chắc ăn) [với tilapia (bản 3G) là mmcblk0p10]

1. TWRP(Advance → Terminal): # df
2. TWRP(Advance → Terminal): # umount /dev/block/mmcblk0p__ <- fill partition number
3. TWRP(Advance → Terminal): # umount /dev/block/mmcblk0p__ <- fill partition number

On PC/Laptop terminal:

# adb push <rootfs_filename>.img /dev/block/mmcblk0p__ <- fill partition number

• grouper has likely data on /dev/block/mmcblk0p9 but make sure!
• tilapia has likely data on /dev/block/mmcblk0p10 but make sure!

Khi cài bản debian pre-image server này vào, debian mặc định sẽ boot vào thẳng root sau lần 2 reboot, khi nhấn Enter tại dòng thông báo

Tạo new user sample như sau:
https://discussions.flightaware.com/t/raspberry-pi-debian-images-latest-release-bullseye/78804/10

# root@rpi4-20210823:~# adduser <username>

• Adding user `<username>' ...
• Adding new group `<username>' (1001) ...
• Adding new user `<username>' (1001) with group `<username>' ...
• Creating home directory `/home/<username>' ...
• Copying files from `/etc/skel' ...

New password: ← Nhớ đặt passwd bằng số 0-9
Retype new password: ← Nhớ đặt passwd bằng số 0-9
passwd: password updated successfully
Changing the user information for <username>
Enter the new value, or press ENTER for the default

• Full Name []:
• Room Number []:
• Work Phone []:
• Home Phone []:
• Other []:

Is the information correct? [Y/n] y

***Tạo wpa.conf cho kết nối wifi bang wpa_passphrase/wpa_supplicant

# su -

# wpa_passphrase [your_ssid_name] [your_router_passwd] > wpa.conf

Loading wpa.conf vào wpa_supplicant và ping thử google.com

# wpa_supplicant -B -i wlan0 -c wpa.conf

# dhclient wlan0

# ping -c 3 google.com

***Tạo kết nối wifi bang iwd daemon

Config NetworkManager using iwd:

# su -

# nano /etc/NetworkManager/conf.d/wifi_backend.conf

[device]
wifi.backend = iwd

# apt install iwd

# systemctl stop wpa_supplicant

# systemctl disable wpa_supplicant

# systemctl start iwd

# systemctl enable iwd

# iwctl

[iwctl]# device list

[iwctl]# station wlan0 scan

[iwctl]# station wlan0 get-networks

[iwctl]# station wlan0 connect [your_ssid]

Passwd: [your_router_passwd]

[iwctl]# exit

# ip a

# dhclient wlan0

# ping -c 3 google.com

Cài đặt sudo

# apt-get update

# apt-get install sudo

# exit

login: <username>
passwd: [your_passwd]

Thêm <username> vào groups sudoers

# su -

# usermod -a -G sudo <username>

# groups <username>

<username> : <username> sudo

Update repository

# sudo apt-get update && sudo apt-get upgrade

# sudo apt-get purge --auto-remove raspi-firmware

Cài DE như Lubuntu, Xubuntu, Kubuntu, MATE, GNOME, Phosh, Budgie, Cinnamon, Elementary, v.v...

Testing Phoc/Phosh Gnome-shell

# sudo apt-get install phoc phosh phosh-tablet

https://gitlab.gnome.org/World/Phosh/phosh
Phosh mặc định khởi động vào user id 1000, nên tạo login cho <username>/passwd(bằng số 0-9) đã tạo trước đó

# sudo nano /etc/systemd/system/phosh.service.d/override.conf
[Service]
User=<username>

Cài thêm preload, tlp, tlp-rdw, phosh-tablet, gnome-control-center, network-manager, bluez, nautilus, firefox, chromium, gnome-terminal, gnome-calculator, gnome-clock, gnome-maps, gnome-weather v.v….

# sudo systemctl enable phosh

# sudo systemctl start phosh

Scan fit screen for apps:
https://linmob.net/pinephone-setup-scaling-in-phosh/

Disable systemd service load failed

# sudo systemctl --failed

# sudo systemctl disable networking

# sudo systemctl disable rpi-reconfigure-raspi-firmware

# sudo systemctl disable rpi-set-sysconf

Bypass emergency shell/emergency mod

# sudo systemctl mask emergency.service

# sudo systemctl mask emergency.target

Edit phoc run with xwayland như trang web này nói
https://wayland.freedesktop.org/xserver.html

Cứ xem phoc như weston, edit như sau:

# sudo nano /usr/share/phosh/phoc.ini

[core]
xwayland = true

[xwayland]
path = /usr/bin/Xwayland

[output:LVDS-1]
modeline = 68.00 800 824 848 880 1280 1285 1286 1318 -hsync +vsync
mode = 800x1280
scale = 1 ← ( 1 or 2 was better than 1.25 - 1.5 - 1.75, because of no gpu accelerate)

# sudo cp /usr/share/phosh/phoc.ini /etc/phosh

Voila! Enjoy Gnome-shell Phosh Mobile ;)

https://source.puri.sm/Librem5/community-wiki/-/wikis/Tips-&-Tricks#setting-a-custom-background-in-phosh

https://puri.sm/posts/easy-librem-5-app-development-scale-the-screen/

https://stealthgun.tweakblogs.net/blog/19368/gentoo-on-a-pinephone-making-it-a-usable-phone

Today, I'll show you upgrading to Debian/Mobian bookworm to get latest version of packages

https://blog.mobian-project.org/posts/2021/03/15/unstable-distro/

https://blog.mobian-project.org/posts/2021/05/17/update-2021-05-17/

Get GPG to connect mobian packages:

# sudo gpg --keyserver keyserver.ubuntu.com --search-keys admin@mobian-project.org

# sudo gpg --keyserver keyserver.ubuntu.com --search-keys 951D61F2BC232697

# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 393F924A855FB27D

Create new mobian.list and extrepo_mobian.sources

# sudo nano /etc/apt/sources.list.d/mobian.list

deb http://repo.mobian-project.org/ bookworm main non-free

Index of /

repo.mobian-project.org

# sudo nano /etc/apt/sources.list.d/extrepo_mobian.sources

Types: deb deb-src
Architectures: amd64 arm64 armhf
Uris: http://repo.mobian-project.org/

Index of /

repo.mobian-project.org

Suites: bookworm
Components: main non-free
Signed-By: /var/lib/extrepo/keys/mobian.asc

# sudo nano /etc/apt/sources.list

deb http://deb.debian.org/debian bookworm main contrib non-free

Index of /debian

ftp.debian.org

deb http://security.debian.org/debian-security bookworm-security main contrib non-free

Index of /debian-security

security.debian.org

deb http://deb.debian.org/debian bookworm-backports main contrib non-free

Index of /debian

ftp.debian.org

deb http://deb.debian.org/debian bookworm-updates main contrib non-free

Index of /debian

ftp.debian.org

# sudo apt update && sudo apt upgrade -y

# sudo apt autoclean 0

Voila! Enjoy Gnome-shell Phosh Mobile on Debian/Mobian bookworm ;)

Control cpufreq, vm, kernel parameters

# sudo nano /etc/sysctl.conf

vm.swappiness=15
vm.vfs_cache_pressure=80

# sudo sysctl -p
# sudo chmod +x /opt/cpufreq.start
# sudo chmod +x /opt/temp_throttle

# sudo visudo

ALL ALL=(ALL) NOPASSWD: /opt/cpufreq.start, /opt/temp_throttle

In foreach command create one .desktop at /home/<username>/.config/autostart/

1. sudo /opt/cpufreq.start

2. sudo /opt/temp_throttle 59 <- this is important, because over 60 degrees, n7 will poweroff

mobile-config-firefox

# git clone https://gitlab.com/postmarketOS/mobile-config-firefox.git

# sudo make install

***Backup full filesystem boot and rootfs

Connect Nexus 7 to PC/Laptop using micro-usb cable, enter TWRP recovery mode → Advance → Terminal

# df

On PC/Laptop

# adb start-server

Backup boot: # sudo adb pull /dev/block/mmcblk0p2 /path/to/boot-kernel-5.14-rc3-next-grate.img

Backup rootfs for grouper(wifi): # sudo adb pull /dev/block/mmcblk0p9 /path/to/rootfs.img

Backup rootfs for tilapia(3G): # sudo adb pull /dev/block/mmcblk0p10 /path/to/rootfs.img

Backup full: sudo adb pull /dev/block/mmcblk0 /path/to/full_backup_mmcblk0.img

Image source from raspi.debian.net:
https://raspi.debian.net/verified/20210823_raspi_2_bullseye.img.xz