I have so "much trouble" with Mageia that I have forgot my user name and password

I have "the famous" ATI Radeon HD Mobility 2400 XT graphic card. I have tried everything, like changing drivers legacy and Xorg, changing settings and options for them (EXA), changing View options in Libre Office (acceleration and anti aliasing), adding fix, installed testing version of Libre office...........................every combination and every idea that is around. The first of all I know that the best solution is to buy new laptop but that isn't option for the next 4 months and the second I am not good with finding solutions on the web ( for that reason I have installed Mageia

Best Regards