If you can't find the proper mailing list, try locating a LUG (Linux Users Group) and searching their mailing list archive.

An example of a LUG close to CMU is WPLUG (Western Pennsylvania Linux Users Group).

Sometimes, the mailing list archives do not have a search interface on the web – you need to download the archive and search it manually. That's fine, just grab the tarball, extract it, and use less to read through it and look for strings of interest, or just grep -n through it.