How to install Ubuntu Touch on Xiaomi Redmi 9A/9C (Draft)

ubuntu_touch_redmi_9a.md

Ubuntu Touch on Redmi 9A Installation (Linux)

1. Unlock bootloader
   https://www.getdroidtips.com/unlock-bootloader-redmi-9-redmi-9a/

2. Downgrade to android 10 (stock rom) by SP Flash Tool or Mi Flash Tool
   https://spflashtool.com/
   https://xiaomiflashtool.com/
   https://xiaomistockrom.com/
   

3. Download UB rom
   Dandelion in name for 9A. Another is 9C (Angelica)
   https://gitlab.com/ubports/porting/community-ports/android10/xiaomi-redmi-9c/xiaomi-angelica
   

4. Download Google platform-tools
   

5. Extract ub file and flash
   Turn off phone, hold "volume down" + "power" to get into fastboot mode or

adb reboot fastboot

Disable VerifiedBoot
https://www.mediafire.com/file/kvz7dsowp09sfb1/vbmeta_disabled.img/file

fasboot flash vbmeta [path to vbmeta_disabled.img]

fasboot flash vbmeta_system [path to vbmeta_disabled.img]

fasboot flash vbmeta_vendor [path to vbmeta_disabled.img]

Flash dtbo and boot

fastboot flash boot [path to boot.img]
fastboot flash dtbo [path to dtbo.img]

Flash system

# boot to fastbootd mode
fastboot reboot fastboot

# delete product partition to get space for system
fastboot delete-logical-partition product

fastboot flash system [path to system.img]

# Reboot to enjoy Ubuntu Touch
fastboo reboot

Troubleshoots

1. Linux doesn't recognize phone when boot to fastbootd mode ->> try to add udev rules https://wiki.archlinux.org/title/Android_Debug_Bridge#Adding_udev_rules

2. Loop boot at redmi logo --> need to flash vbmata. --> use mtkclient if you cannot boot to flashboot https://github.com/bkerler/mtkclient (python mtk w --loader [path to loader]/MTK_AllInOne_DA.bin --preloader [path to preloader]/preloader_k62v1_64_bsp.bin vbmeta [path to vbmeta]/vbmeta.img)

How do I get UB (boot.img, dtbo.img and system.img) for Xiaomi Redmi 9C? Gitlab doesn't seem to have releases, nor I can find anything here

How do I get UB (boot.img, too.img and system.img) for Xiaomi Redmi 9C? GitLab doesn't seem to have released, nor I can find anything here

You must log in to GitLab and select "Build > Jobs or Artifacts" from the left-hand menu. Download a devel-flashable file (>700MiB) if you have 9C, use it at your own risk.

Works just fine! Thanks!

i stuck in here

it can't detected fastboot in fastbootd

in device manager its just show warning

i stuck in here

it can't detected fastboot in fastbootd

in device manager its just show warning

You need to install usb driver for Redmi 9A/C. Please gg it, I don't use windows.

i stuck in here

it can't detected fastboot in fastbootd
in device manager its just show warning

You need to install usb driver for Redmi 9A/C. Please gg it, I don't use windows.

i don't know where to install it, already installed mtk driver for flashing this device, but fastbootd doesn't recognize this phone

Hey, where is dtbo.img? There's only boot, recovery, and system

Hey, where is dtbo.img? There's only boot, recovery, and system

It's been a year since I wrote this guide, and now I don't own Redmi 9A anymore. Please join this or this chat group for help.

Where i can find all .img files for Redmi 9A?

Where can I download system.img?

Where i can find all .img files for Redmi 9A?

Please join this or this chat group for help.

Where can I download system.img?

Please join this or this chat group for help.

in Windows11 fastboot can see the phone (Redmi 9A) in fastboot mode. But can not see it in fastbootD mode. Is there any workaround to figure this issue out?