Re: Printing problems after upgrade to F30

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On Wed, 2019-05-01 at 11:48 +0200, Jouk Jansen wrote:
> 
> If I try to reconfigure the printer via cups and indicate that the
> printer
> is to be shared, I get the message that sharing is not possible for a
> Kerberos-printer. On this system I never configured Kerberos. So what
> is
> happening here? 

I've got an identical problem.  I've filed a bug report here:
https://bugzilla.redhat.com/show_bug.cgi?id=1700791

I think it was caused by:
https://bugzilla.redhat.com/show_bug.cgi?id=1662408

I don't think it's triggered by "Shared"; but rather by
"AuthInfoRequired" that changes from None or Username,Password to
Negotiate.

To work around it, here's what I did:
- move /usr/lib/cups/backend/smb to /usr/lib/cups/backend/smb.real
- write a script /usr/lib/cups/backend/smb to replace it:

#!/bin/sh
cat - | /usr/lib/cups/backend/smb.real "${@}"

Remember to make it executable.  You'll notice this just calls
smb.real.  The actual change is that this script exits with 0, so Cups
never sees an error.  Suddenly it doesn't trigger AuthInfoRequired, and
actually prints.

NOTE: this will be overwritten every time cups is upgraded.  The
workaround can be smarter if you change DeviceURI to something else
(say smbworks://) and create a script accordingly.

I do this at work for a printer that has every non-SMB port firewalled.

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