Comment 6 for bug 1121149

Hi,

I will go a little deeper into the explanation of point (2), regarding
"remove and install" on a Zentyal server.

Zentyal is a Windows server replacement based loosely on Ubuntu. The
Zentyal server is administered entirely through a web interface, even at
the console. Their administration backend app monitors packages and
configuration files on the server, and it maintains its own configuration
information in a separate redis database. When certain package changes
occur, such as removing HPLIP, Zentyal automatically "corrects" the server
configuration to match the new package status. As a result, when the
installer removes and installs HPLIP, printer sharing is disabled and
printer queue configurations are lost even though this is not the intent of
the HPLIP installer program. Ouch. One of my clients discovered this
peculiar bug, and fortunately he was sophisticated enough to understand
what happened and recover from this. When he turned Printer Sharing back on
in Zentyal, it proceeded to reinstall the HPLIP package from repositories.
Fortunately his printers worked again when he reinstated the queues.

This incident indicates the possible problems with "remove and install,"
particularly on servers as opposed to desktops. I thought you would like to
know what happened. My guess is that now, his server is running the older
HPLIP package but with updated printer definitions. This is what led me to
think that separating printer definitions from code might be a good thing.

Gerald
<email address hidden>
901.276.1004

On Thu, Mar 14, 2013 at 12:36 AM, Amarnath Chitumalla <
<email address hidden>> wrote:

> Hi Gerald,
>
> Thank you for writing us.
>
> 1)Regarding HPLIP version information
> -->HPLIP version information will be displayed in first line, when any of
> HPLIP command (hp-check, hp-toolbox, hp-setup etc) run.
> e.g HP Linux Imaging and Printing System (Ver. 3.13.2 )
> --> where as 'dpkg -l hplip', displays available package in repository.
>
> 2) Regarding existing Printer definitions for New HPLIP installation with
> "Remove and Install" option.
> As per my understanding, print queue is not removed for existing printers.
> (Please let me know if it is different).
> --> Reason for not removing the print queue is, user might have changed
> the settings according to requirement. If Installation removes the queue
> and setup new queue, user may loose his preferences.
>
> 3) Regarding updating only printer definitions.
> --> Thank you for the suggestions, we will look into this.
>
> Regards,
> Amarnath
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1121149
>
> Title:
> upgrade installer 3.12.11 contains programming errors
>
> Status in HP Linux Imaging and Printing:
> New
>
> Bug description:
> Kubuntu, OS version Linux 3.5.0-23-generic, KDE SC Version 4.9.4
>
> Bug 1:
>
> "Download in progress....180%" Acceptable only for the
> overachievers.
>
> Bug 2:
>
> "System error: newline unexpected" So we are using Python, good;
> but we don't understand whitespace, bad.
>
> Bug 3:
>
> "Upgrade is Completed" message is not followed by <OK>, window
> process does not terminate even with <Ctrl-C>.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/hplip/+bug/1121149/+subscriptions
>