Updating hardy to ibex
To avoid damaging your running system, upgrading should only be done from one release to the next release (e.g.Ubuntu 12.04 to Ubuntu 12.10) or from one LTS release to the next (e.g. If you wish to 'skip' a version, you can back up your data and do a fresh installation, or progressively upgrade to each successive version.A generic upgrade guide can be found here, this guide does not mention specific quirks per release.Refer to their own upgrade notes as mentioned below.You can verify the proper operation of the mic using arecord and aplay like so (where hw:0,0 refers to the channel I activated as shown in the screenshot): Another thing I have to point out is that I have no idea if this is a best practice to getting it working right.
If you have installed software from other sources, the upgrade may go more smoothly if you remove this software before attempting the upgrade.
The long time support (LTS) version is recommended for people in an environment (generally commercial/industrial) that do not want things to change and do not require newer/faster/updated versions, but instead want to keep the same version for a longer amount of time.
Using packages from repositories not controlled by Ubuntu is not recommended as it can be a security risk and may break or complicate your upgrade.
LTS stands for "Long Term Support," meaning the Desktop Edition is supported for three years, and the Server Edition is supported for five years.
"Supported" means that Ubuntu will continue to provide security and the like until the EOL (End-of-life) date.