When I open the printer settings, I see for a short time the normal GUI (Add Printer, Remove Printer etc...) but then it vanish and there is big printer with the red/white error cross and it says "Invalid Argument". Ant there is nothing I can do anymore (except going back to system settings).

I don't have any printer installed yet (but I want to...).

What can I do about this?

in konsole run

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kcmshell4 kcm_printer_manager

any error messages?

also try running as root with kdesu

google01103 wrote:in konsole run

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kcmshell4 kcm_printer_manager

any error messages?

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kcmshell(3918) KCupsConnection::retry: IPP_INTERNAL_ERROR: clearing cookies and reconnecting
kcmshell(3918) KCupsConnection::retry: IPP_INTERNAL_ERROR: failed to reconnect
...
kcmshell(3918) KCupsConnection::retry: IPP_INTERNAL_ERROR: clearing cookies and reconnecting
kcmshell(3918) KCupsConnection::retry: IPP_INTERNAL_ERROR: failed to reconnect
kcmshell(3918) KCupsRequest::serverError: status unrecognised:  1280

Seems to be something with cups. AFAIK, I had set CUPS to autostart, but apparently not? How can I check & fix this?

google01103 wrote:also try running as root with kdesu

Which command line option do I need here?

is cupsd running?

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pgrep cupsd

since my system requires the module run as root and you didn't state if you were requested the password

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kdesu  kcmshell4 kcm_printer_manager

google01103 wrote:is cupsd running?

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pgrep cupsd

Nothing happens here.

google01103 wrote:since my system requires the module run as root and you didn't state if you were requested the password

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kdesu  kcmshell4 kcm_printer_manager

With this command I'm asked for root pw. However, it doesn't matter I get the same error as root.

as pgrep doesn't respond with a process number cups isn't running

try running as root in konsole

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 cupsd

then make sure it's running with pgrep and if it is try printer settings again

Thank you, everything works now!

I hope this isn't too much OT, but can you tell me how I make sure that cups is running every time on system start?

I don't know how Chakra and this might be distro specific but I did find a couple of useful posts that should help:

setting up printers (note the "Starting the printer installation" section) http://chakra.sourceforge.net/wiki/inde ... ur_Printer
thread regarding cups not starting at boot http://chakra-project.org/bbs/viewtopic.php?id=7835

sudo systemctl --enable cupsd

Note that you can also try as a debugging step whether the CUPS web administration interface works.
This is accessible at http://localhost:631/ usually

Thanks all for your help, I managed now to enable cupsd on system startup (which must be an initial error of my distro).

Anyhow, if there would have been a sane error message, I wouldn't have this forum bothered at all, but instead looked at the CUPS daemon.
Thats why I filled this followup bug: Provide sane Error Message when CUPS is not running