This is a series of articles looking at the ASRock Industrial NUC BOX-255H running Linux. In this series, I examine every aspect of this Mini PC in detail from a Linux perspective.
This is a blog article which I’ll be updating regularly. It captures changes I needed to make following upgrading from Ubuntu 25.04 to Ubuntu 25.10.
Ubuntu 25.10 (Questing Quokka) is the latest version of Ubuntu, the most popular Linux distribution powering millions of desktops, workstations, servers, and cloud instances. It was released last week.
Flatpak
Following upgrading the distribution, Flatpaks wouldn’t install (without using sudo) throwing a wobbly with “could not unmount revokefs-fuse filesystem” errors when trying to install a Flatpak.
The issue is caused by AppArmor, software which enforces Ubuntu’s security policies. A fix has been released but it wasn’t available on my system due to phasing.
sde@linuxlinks:~$ sudo apt upgrade
Not upgrading yet due to phasing:
apparmor libapparmor1 libapparmor1:i386
Normally I would wait for phased updated to be available for me, but I need Flatpak for testing software. On this occasion, I chose to bypass phasing.
$ sudo apt -o APT::Get::Always-Include-Phased-Updates=true upgrade
Only issue that command if you understand its implications.
VirtualBox stopped working
None of my virtual machines would start after upgrading Ubuntu, with the error “HM ring-0 init failed:” being output.
This issue is fixed by commenting out ‘kvm_intel’ in the /etc/modprobe.d/blacklist file.
Choppy Bluetooth
I started getting choppy Bluetooth following the upgrade.
This fix is also simple. Edit /etc/bluetooth/input.conf with a text editor e.g.
$ sudo nano input.conf
Uncomment the line in the [General] section:
IdleTimeout=0
and restart the Bluetooth service.
$ sudo systemctl restart bluetooth.service
Complete list of articles in this series:
| ASRock Industrial NUC BOX-255H | |
|---|---|
| Introduction | Introduction to the series and interrogation of the NUC BOX-255H |
| Benchmarks | Benchmarking the NUC BOX-255H |
| Power | Testing and comparing the power consumption under various workloads |
| Stable Diffusion | Deep Learning with Stable Diffusion |
| Audacity AI Plugins | Let's explore OpenVINO AI Plugins for Audacity |
| 3 Types of Cores | P-cores, E-cores and low power E-cores performance |
| GIMP AI Plugins | Stable Diffusion, Super Resolution, Semantic Segmentation |
| Ubuntu | Upgrading from Ubuntu 25.04 to Ubuntu 25.10 |