I have updated ubuntu from 10.10 to 11.4 on my X200 Tablet.
- Backup files, as before.
- Upgrade from update-manager.
Everything was straightforward, and it took several hours from download to setup.
It looks nice. But, Magick-rotation did not work. Some functions on latex and dvi do not work either.
I decide to reinstall Ubuntu 11.04 later.