Libreoffice does not update printer list

Raul Dias, thank you for reporting this and helping make Ubuntu better.

To confirm this is already resolved in Ubuntu, could you please test http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?

Just did a full upgrade to 16.04.
cups is 2.1.3-4
libreoffice is 1:5.1.2-0ubuntu1 (5.1.2.2)

The scenario:
1 - Cups is my localhost:

 raul@nostromo:~$ cat /etc/cups/client.conf
 raul@nostromo:~$ lpstat -a
 EPSON_L355_Series accepting requests since Sáb 23 Abr 2016 17:22:15 BRT
 HP-LaserJet-1200 accepting requests since Sáb 02 Abr 2016 17:45:49 BRT
 Xerox_Phaser_3200MFP accepting requests since Sáb 05 Mar 2016 15:31:34 BRT

The Libreoffice Printer Dialog is attached to comment #2.
So far so good.

2 - Change client.conf to use a remote server:

 raul@nostromo:~$ cat /etc/cups/client.conf
 ServerName impressoras2
 raul@nostromo:~$ lpstat -a
 CPD accepting requests since Seg 25 Abr 2016 08:06:59 BRT
 CPD-Cond accepting requests since Qua 26 Ago 2015 17:28:58 BRT
 CPD-Normal accepting requests since Qua 26 Ago 2015 17:36:20 BRT
 CPD-P-C-2 accepting requests since Qua 26 Ago 2015 17:39:08 BRT
 CPD-P-Cond accepting requests since Qua 26 Ago 2015 17:38:39 BRT
 CPD-P-Norm accepting requests since Qua 26 Ago 2015 17:37:30 BRT
 ECOMMERCE accepting requests since Seg 25 Abr 2016 08:00:07 BRT
 EPSON_LX-300-RAW accepting requests since Ter 12 Abr 2016 08:00:05 BRT
 HP_LaserJet_1200 accepting requests since Qui 10 Mar 2016 08:01:21 BRT
 LX-300-A accepting requests since Sex 16 Mai 2014 14:43:17 BRT
 LX-300-B accepting requests since Sex 16 Mai 2014 14:43:36 BRT
 Padrao accepting requests since Sex 16 Mai 2014 14:39:28 BRT
 saci accepting requests since Sex 22 Abr 2016 14:26:00 BRT
 Zebra accepting requests since Sex 16 Mai 2014 14:44:48 BRT

The Libreoffice Printer Dialog is still the attached to comment #2.
The printer list is not refreshed. Some libreoffice internal cache.

3 - Close every instance of libreoffice running and start it again.

The Libreoffice Printer Dialog is the attached to comment #3.
This is what was expected on step 2.

This seems to be the same bug in https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/911235, except that it does not work in this situation.

As I mentioned, this is present for many years now.

I did some digging and the printer list is pulled when I first hit CONTROL-P (File->Print).

So, if I change the client.conf before trying to use the printer, it will get the current list even after it has started up.
It will not update any time later on.

Status changed to 'Confirmed' because the bug affects multiple users.

Were you able to find out the root cause of this?

I am also seeing this on a 16.04 machine. I've several other 14.04 machines in the same network, that don't have this issue.

I have a central cups:amd64/stable 1.7.5-11+deb8u1 server, that broadcasts the list of printers to all of our workstations, but interestingly only the new 16.04 machine, that I set up to test the new LTS release, shows these symptoms. When this happens, only the "Generic Printer" will be shown, instead of the actual printer list.