Re: upgrading from 10.04 LTS to 12.04
An Ubuntu® dist-upgrade from 10.04.7-LTS Lucid Lynx™ to 12.04.3-LTS Precise Pangolin™ has several issues that call for a backup of user documents, a clean ("Custom") installation of the upgrade OS, and restoration of user documents to the upgraded system. Numerous Packages are incompatible between 10.04.7-LTS and 12.04.3-LTS due to changes in dependencies, as I found out the hard way taking my "Hot Rod gPC" from 10.04.4-LTS to 12.04-LTS back in April 2012. Additionally, many Programs in 12.04-LTS have had changes in "dot-programname" data formats compared to their 10.04-LTS counterparts.
Gigabyte GA-MA78GM-S2HP / AMD Athlon 64 X2 5600+
Audio: Creative Laboratoies SB0350/SB0250 (PCI)
Video: Diamond Radeon HD 5450 (PCIe x16)