Bug#543468: RIPCache
This happens to me, too, and I don't have a ~/.cups/client.conf . (I
do, however, have "ServerName printserver.company.invalid" in the
system-wide /etc/cups/client.conf .)
I did ps axf while it was hung prompting for the password, and the
command doing the prompting was: cupsctl RIPCache=3083788k
As a workaround, I commented out the call to set_ripcache in the initscript.
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