[solved] Connection to CUPS server fails...

[oblio]

Hi,

Unable to "add printer" in Kubuntu 6.04 Dapper Drake Flight 4 (aka Flight 4 henceforth) , right after installation on HD :

"Unable to retrieve the printer list. Error message received from manager:
Connection to CUPS server failed. Check that the CUPS server is correctly installed and running. Error: host not found".

I noticed this also on the Flight 3 installation, and on a recent Kubuntu 6.04 AMD64 installation (build 24.02.2006).  I did not find a cure for it.  I have never seen this failure in any linux distro that I tried.

{Added # 1}
After learning elsewhere that there might be a wrong entry in System Settings | Printers | Print Manager | Configure Manager |  Cups Server under "Host" like "/var/run/cups/cups.sock".  It needed to changed to "localhost".
I did so.  But the problem of not being able to add a printer is more persistent (although the error message has now - at the end) :

"Unable to retrieve the printer list. Error message received from manager:
Connection to CUPS server failed. Check that the CUPS server is correctly installed and running. Error: the IPP request failed for an unknown reason".

{Added # 2}

After some additional research :

In /etc/cups/cupsd.conf make the following change:

comment out the line:
AuthType Basic
in the <Location/admin> section at the bottom of the file (comment out
with #'s). Then, restart CUPS.

After this I could add my HP Laserjet 4M (parallel connected) and Epson C44UX (USB) like I always could in any debian-based distro.  Only thing left: the installed printers did NOT show up immediately under "installed printers".
I had to exit System Settings and open again; then they were there.

Problem solved (at least for me).  Apparently much more people have encountered this problem in some K/Ubuntu version.

{Added # 3}
Moderator: please move thos one to the "software" or "post-installation" section.  The problem was not hardware related after all.......

Regards.

[terracotta]

Re: [solved] Connection to CUPS server fails...

Hye, I don't think they should move it to software related, because if someone is going to try to find a solution he's going to end up on hardware support. I'm gonna try this solution on flight six right away, I'll tell whtat if it helps here too.

[oblio]

Re: [solved] Connection to CUPS server fails...

Hye, I don't think they should move it to software related, because if someone is going to try to find a solution he's going to end up on hardware support. I'm gonna try this solution on flight six right away, I'll tell whtat if it helps here too.

I think it is already solved in Flight 6 (which I am running now). I did not meet the same problem in Flight 6.

Regards, Ko

[terracotta]

Re: [solved] Connection to CUPS server fails...

Hye, I don't think they should move it to software related, because if someone is going to try to find a solution he's going to end up on hardware support. I'm gonna try this solution on flight six right away, I'll tell whtat if it helps here too.

I think it is already solved in Flight 6 (which I am running now). I did not meet the same problem in Flight 6.

Regards,  Ko

Mhm, I was just about to say that I got:
"Unable to retrieve the printer list. Error message received from manager:
Connection to CUPS server failed. Check that the CUPS server is correctly installed and running. Error: the IPP request failed for an unknown reason".
from the beginning and that I had to do

comment out the line:
AuthType Basic but not in <Location /admin> but in:

<Location /admin/conf>
# AuthType Basic
Require user @SYSTEM
Order allow,deny
Allow localhost
</Location>
But the problem is solved now yipiieee, thanks a lot for your help.