[Bug 40795] not only on 'live' systems issue

[Magnus]

my system is currently a Dapper release (with latest updates installed).
It has been upgraded from breezy.

I have the same issues when trying to add a printer as a user:
access_log:
localhost - - [09/Aug/2006:10:57:59 +0200] "POST /admin/ HTTP/1.1" 401 368 CUPS-Add-Modify-Printer successful-ok
localhost - root [09/Aug/2006:10:57:59 +0200] "POST /admin/ HTTP/1.1" 200 368 CUPS-Add-Modify-Printer client-error-not-possible
error_log:
E [09/Aug/2006:10:57:59 +0200] CUPS-Add-Modify-Printer: Unauthorized

and when launching the gnome-cups-manager with sudo:
** (gnome-cups-add:5579): WARNING **: IPP request failed with status 1028

Existing printers work fine.

I have tried the same on another machine with the same 'history' and it
works on that one, eventhough I get the Unauthorized message!

btw: on both machines I get these in syslog:
Aug  9 10:48:17 mini hp: unable to open /var/run/hplip/hpiod.port: No such file or directory: prnt/hpijs/hplip_api.c 84
Aug  9 10:48:17 mini hp: unable to connect hpiod socket 50000: Connection refused: prnt/hpijs/hplip_api.c 703
Aug  9 10:48:17 mini hp: unable to send ProbeDevices: Broken pipe

-- 
cannot write /var/cache/cups/ppds.dat on live system
https://launchpad.net/bugs/40795