Howdy, Well I just went back to using two monitors in twinview mode after a few months of single monitor suffering. But now when KDM start I get half a screen of garbage on the left half of the left monitor and on the right half of the right monitor. OK, should just need to set the background image. So head over to Computer, System Settings, Advanced, Login Manager but got a problem, everything there is disabled. Docs imply there should be an Admin button but it's not there (Have: Help, Defaults, Reset(disabled), & Apply(disabled)).
Thinking, oh well, off to /usr/kde/4.2/share/config/kdm, edit kdmrc and set GreeterScreen to -1 (the only multi display setting I saw) to see what happens. Ran genkdmconf. Restarted xdm. No change. Any ideas? TIA, Roy