The porting guide requires img2simg and simg2img which are provided up to Ubuntu 22.04 and not later.
You can install these utilities using this snap:

sudo snap install android-platform-tools

sudo snap connect android-platform-tools:adb-support
sudo snap connect android-platform-tools:block-devices
sudo snap connect android-platform-tools:raw-usb
sudo snap connect android-platform-tools:removable-media
sudo snap connect android-platform-tools:network
sudo snap connect android-platform-tools:network-bind

sudo snap alias android-platform-tools.img2simg img2simg
sudo snap alias android-platform-tools.simg2img simg2img

@BaShMu this tutorial includes kernel compilation and rootfs creation after it:
https://docs.ubports.com/en/latest/porting/build_and_boot/standalone_kernel_build.html

@BaShMu it's an old way of porting devices. Use the tutorial I linked

@BaShMu it's an old way of porting devices. Use the tutorial I linked

@BaShMu this tutorial includes kernel compilation and rootfs creation after it:
https://docs.ubports.com/en/latest/porting/build_and_boot/standalone_kernel_build.html

@developerbayman does it support Standalone Kernel Method?

@xixired can you please in your original post put a notice that the port is for Mediatek version of device not Qualcomm one? I anticipate someone getting confused about this

@gn-lin s21 is a different phone, has a different SoC and not really related to this s20 fe effort

@AppLee said in Can it do External Monitor + Screen Off?:

And how would you lock the device if not with the power button?

With a shortcut on my keyboard connected via USB-C or Bluetooth. Again, this is not a broken-device use case.

@AppLee said in Can it do External Monitor + Screen Off?:

The behavior of Ubuntu Touch is as expected.

Not really. It should be possible to turn off the device's screen with a power off button and use the device with External Monitor. I don't want my device's screen to waste energy and show anything while I'm using the device as a portable PC.

What are my possible actions if UBports boot.img is couple of MBs larger than target boot partition?

@kugiigi it's software - stock rom does this fine

Can Ubuntu Touch use External Monitor with Screen Off?

I have a device (Galaxy S10) with broken display and I tried some old UT build (16.04 I think) for it. It could only do HDMI output to External Monitor while the Screen was On. When I turned the screen off, the External Monitor locked. This is undesirable in my situation - the device's display does unwanted clicks.

Does it still work the same way or has there been some settings/improvements added?