I was quite happy with default video driver under OpenSuse 11.4 and 12.1. After reinstall by use of OpenSuse 12.2 KDE live iso no issue with KDE session appeared until Firefox or Konqueror browsers were started. When browsers started under KDE session, after several sussesful displays of web pages, screen gets palish and system seems to be frozen (no reaction to keyboard and/or mouse actions).
When sign-on under ICEWM session, browsers can be used without issues as well as nxfree client displays remote KDE session OK.
Any recommendations appreciated,
Many thanks for your advices in advance,