When I try to dial in with my serial 56k modem (which worked previously) I now get an error saying that smpppd is not running or I am not a member of the group called ‘dialout’. (i checked, I am a member!) Under Yast, I can see that smpppd and kinternet are installed. any Ideas?
Check in Yast → system → runlevels. Make sure smpppd is set to run.