If I add an unreachable CUPS server to my /etc/cups/client.conf and try to open the Print Dialog on LibreOffice, it freezes the whole UI.
Suggestion: the CUPS request for printers (cupsGetDests or http request) should be done in another thread.
How to reproduce:
1. Open /etc/cups/client.conf
2. Append "ServerName cups.nikhef.nl" (with no quotes), and save.
3. Open any LibreOffice application and try to print something.
Print Dialog to show.
Repro, but not in 5.0.4.
Felipe: what version did you try with?
Ubuntu 15.10 64-bit
Build ID: 1:5.0.4~rc2-0ubuntu1~wily1
Locale: en-US (en_US.UTF-8)
Build ID: c43fdd74097cb12f69f86fd1217dd2f41ccae101
CPU Threads: 2; OS Version: Linux 4.2; UI Render: default;
TinderBox: Linux-rpm_deb-x86_64@70-TDF-dbg, Branch:master, Time: 2016-01-25_23:43:01
Locale: en-US (en_US.UTF-8)
Fedora 23 64bits
Build ID: 22.214.171.124-3.fc23
version packaged on Fedora 23.
Strange.. it only hangs for me in 5.2.
The issue with "ghost" printer has a serious impact on the "styles and formatting" window (and "format->character" etc.), which freezes for about 5-10 seconds.
Build ID: 1:5.4.4~rc2-0ubuntu0.16.04.1~lo1
CPU threads: 4; OS: Linux 4.10; UI render: domyślny; VCL: gtk3;
Ustawienia regionalne: pl-PL (pl_PL.UTF-8); Calc: group
Description: Ubuntu 16.04.3 LTS
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Is this still an issue with CUPS >= 2.2.7?
I can't recall the details at the moment, but I remember that something has changed in CUPS that made us drop the idea of doing something similar for the Qt print dialog, s. https://codereview.qt-project.org/c/qt/qtbase/+/225198/ , in particular the last comment there:
> Abandoning this patchset since it is quite complex (threads & stuff) and the
> kind of printers it supports are no longer available on CUPS 2.2.7 so we've
> decided to not increase the complexity of the code to support "old" printer
If this is no longer an issue with current CUPS versions, I suggest to close this bug as WORKSFORME as well.
I tested now with newer cups (2.2.12) and libreoffice (126.96.36.199), and it works as expected.
(In reply to Felipe Borges from comment #7)
> I tested now with newer cups (2.2.12) and libreoffice (188.8.131.52), and it
> works as expected.
Thanks for testing!