Raspberry PI 4 and Ubuntu Mate 22.04 Upgrade

Upgrading to Ubuntu Mate 22.04 was fairly painless but it did take rather a long time to complete.

A couple of things that came out of the upgrade was the inability to use the USB Serial Port to communicate with the Xiegu G90 with FLRIG, thiking this was permissions I checked that my user still had access to the dialout group. It did so this was clearly not the issue.

After checking the boot messages and running sudo dmesg it was clear that this was the root cause

[ 5284.610952] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0
[ 5289.155968] usb 2-1: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
[ 5289.157525] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0

so we performed the following:

sudo systemctl stop brltty-udev.service
sudo systemctl mask brltty-udev.service
sudo systemctl stop brltty.service
sudo systemctl disable brltty.service
sudo reboot

You can check these service are inactive/dead by doing

sudo systemctl status brltty-udev.service
sudo systemctl status brltty.service

Normal service was resumed and we able to select the USB device for FLRIG control, WSJTX works as per normal and also Fan Control just as with Ubuntu Mate 20.04. The user interface is much cleaner with Mate 22.04 and system performance it noticably improved.