how to fix Ubuntu 22.04
Tell us about your setup:
- What iDevice are you using?
- On what version of iOS is it?
- What version of checkra1n are you using? Latest
- What is your host system (OS version? Hackintosh? VM? etc.)? Ubuntu 22.04
- How are you connecting to the device (USB-A? USB-C? Apple/3rd party cable? Through a USB hub?)?
What are the steps to reproduce the issue?
- installing it on ubuntu 22.04
- launch it
...
What do you expect, and what is happening instead?
Did you see a popup on the device stating it entered "Safe Mode" due to an error?
Does the issue also occur if you tick "Safe Mode" in the checkra1n options?
Any other info, error logs, screenshots, ...?

Try to install libusb and libusbmuxd. It helped for me.
Try to install libusb and libusbmuxd. It helped for me.
same maybe it is display issue
sudo apt install libimobiledevice6 sudo apt install libplist3 sudo apt install libusb-1.0-0 sudo apt install libc6.1 sudo apt install libdb1-compat sudo apt install libusbmuxd sudo apt install usbmuxd sudo apt install ideviceinstaller python3-imobiledevice libimobiledevice-utils python3-plist ifuse usbmuxd libusbmuxd-tools
installed all above, still app window too small to do anything, cannot be resized

installed all above, still app window too small to do anything, cannot be resized
the app requirements are installed or it will not work you stupid of course i have everything installed and same
happening to me too

use a cli build https://checkra.in/releases/#all-downloads
or try to install another desktop environment like XFCE or LXDE