Disclaimer: feel free to edit
Other often recurring questions that lack the right information to be able to answer the question or judge whether it is a duplicate: [sorry, I don't have the time to write full use cases now, but maybe someone else has]
- why does Ubuntu boot to a black/purple screen?
- does Ubuntu support my hardware?
- my GPU
- my phone
- my old computer with low hardware
- the new, supercomputer I want to buy
- my TV
- I have just installed Ubuntu and I have lost my data. How can I recover it?