Seems to me, from the last few days of irc'ing, googling and forum crawling and trawling that one of the big headaches is that older ATi Graphic chipsets are now not supported by the AMD / ATI catalyst drivers. This trouble is present in the newer versions of linuxmint (14 and 13) and also other later editions of ubuntu, fedora .
Solutions seem to vary for different Klinux OS's and different hardwares. The hardware seems to react differently to similar methods to resolve the problem.
the Mint irc channel seems (to me) to have quite a few people asking for help with old ati chipset problems on newer mint editions
My own trouble is posted here
Display Issues Vesa/Radeon fail, refresh rate is 0.0 hz http://forums.linuxmint.com/viewtopic.php?f=110&t=125880
Am wondering if people who have resolved their own issues can post their solutions here - which machine specs and how they resolved the issues. And maybe links to other solutions they may be useful to troubled members of the community.
One solution (or part thereof ) is posted separately below
As far as my own trouble goes it seems like I will revert to lm 13 and stay there for as long as possible