I stopped using Ubuntu 10 years ago, when I had a weird issue. Out of nowhere computer locked up and required a hard reset. It took a while when I figured out that issue originated with Intel WiFi card. I eventually found the bug, it turned out that kernel crashed whenever the adapter sensed an 802.11n packet (the protocol was very new at the time so it wasn't everywhere yet). Ubuntu still decided to go ahead with the release, yet hold off on including freshly released major version of Open Office (I think version 3), because of stability. This was extremely frustrating, because there was no fix and no option to rollback to older version. So that was when I dropped this POS and used a different distro. I'm wondering if that's again Ubuntu issue and not CPU.