Taming the Virtual Hydra: Troubleshooting VirtualBox on NixOS

What started as a quick VirtualBox install turned into a multi‑headed boss fight: USB errors, a sulking kernel driver, a turf war with KVM, and even a Nix syntax bite. Here’s the complete journey and the fixes that finally made my VM boot. Head #1 — USB devices wouldn’t enumerate Can't enumerate USB devices Could not load the Host USB Proxy service: VERR_NOT_FOUND Root cause: Host USB support + Extension Pack missing, and the user not in vboxusers. ...

August 24, 2025 · SarCoptU

Tweaks on Home Computer (Mostly GNU/Linux)

I have some peculiarities for my desktop setup that I use every time I reinstall a new OS. So instead of researching how to do the setup all over every time I reinstall an OS, dual boot, or distro hop, I will throw them all in a blog post and save some keystrokes and a bit of time. On my main computer, an old Dell Optiplex, with an NVIDIA GTX1650, I am dual-booting Kubuntu 20.04 and Windows 10. ...

May 23, 2021 · SarCoptU

Major breakthrough – OSSU

Today while desperately trying to find a way to understand more about programming and learn more about CS basics, I got lucky. Open Source Society University is developed by a group of motivated people that are organising a curriculum for getting the equivalent of a CS degree while following free courses online from excellent resources. This will definitely structure my leaning greatly and I can’t wait to start studying.

May 17, 2020 · SarCoptU