Further investigation has identified this to be a SMB issue after all, which is unrelated to the libreoffice package.
** Changed in: libreoffice (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice in Ubuntu. https://bugs.launchpad.net/bugs/1719685 Title: Long delays on opening & freezes on closing application with SMB shared files Status in libreoffice package in Ubuntu: Invalid Bug description: Opening even small files (14.3kB) from an SMB share results in delays of 20 seconds or more. Clicking to close the Calc application after the file is saved results in a freeze. Only manually killing the libreoffice processes will close the application. (journal.txt deleted - judged irrelevant after replication of bug resulted in no log output during the period the issue was taking place). ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: libreoffice 1:5.4.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1 Uname: Linux 4.13.0-11-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Sep 26 17:27:13 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2017-09-14 (12 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170912) SourcePackage: libreoffice UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1719685/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp