I have a NucBox G5 and I think I'm impacted by the same issue. The next boot after the autoupgrade to 12.2.1, the system boots into the Kodi interface and after a few seconds, hard locks. I have not been able to access the system to perform any kind of diagnostics because of this hard lock, but did manage somehow to get the attached screen shot to appear once. I don't know if it's useful but wanted to share whatever I could to help troubleshoot this issue.
[x86-64] Update to LE 12.2.1 kills my NucBox G5
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hellfroze -
November 16, 2025 at 10:34 PM -
Thread is Unresolved
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Hi, probably isn't the best solution, but if nobody else with anything better...
As your device is a miniPC, you could try to boot a live linux from USB and backup your data (will be on an ext4 partition, and look for the "userdata" folder, or anything else if you have). In this way you can check the hardware too.
Run the LE from USB (select "live" at installer screen), so maybe you can try first if the newer versions of the LE working on your device... If working in the live mode, try to install it and use the files from backup to restore your data.
Hint: if you don't want to rewrite many times your USB stick for different installers, check the Ventoy project. Working even with the LE image (I tried in "live" mode), just unpack the LE "img" file somewhere to the USB stick after the Ventoy installed.