We support a business accounting app. All we need to do is print old-fashioned accounting reports... Okidata-391 dot matrix printer, continuous green-bar paper.
without anny warranty
remove both or try redhat-config-printer first (sometimes i like cups but sometimes i hate it)
# rpm -e cups # rpm -e LPRng
install only LPRng and the good old redhat-config-printer-package
# rpm -ivh LPRng # rpm -ivh redhat-config-printer
# redhat-config-printer or # redhat-config-printer-tui there you can find okidata ML-391 omni ML-391 Turbo omni
good luck
-- shrek-m