Some further information from some investigations: Firstly, following up on the "time theory" above. It seems to occur at times xx:03:07, xx:08:07, xx:13:07, ... Ie, every five minutes at seven seconds past. This seems very regular.
Secondly, following the comment above, I had been previously running LibreOffice-Calc, but the problem persists after it was shut down. (Confirmed with a "ps -ef" command that there were no stray tasks. In any case, I would think that whatever LibreOffice does, gnome should not hang like this! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1676304 Title: Gnome hanging at random times for 1 minute or so Status in gnome-session package in Ubuntu: Confirmed Bug description: Gnome is hanging randomly for 1 minute or so. The mouse cursor still moves, but all windows and content freezes. The seconds display on the clock stops moving. One weird thing (may be coincidence) that I just noticed while doing this bug is the hang always stops when the clock reads xx:xx:07 (ie, the seconds is always 07) The following are two instances from /var/log/syslog (I report them both as the same bug because the symptoms are the same and the last two lines in the log are the same); INSTANCE 1: Mar 27 18:53:09 dragonfly gnome-session[1605]: ** (soffice:17185): WARNING **: Unknown event notification 34 Mar 27 18:53:13 dragonfly gnome-session[1605]: ** (soffice:17185): WARNING **: Unknown event notification 36 Mar 27 18:53:13 dragonfly gnome-session[1605]: ** (soffice:17185): WARNING **: Unknown event notification 36 Mar 27 18:53:13 dragonfly gnome-session[1605]: ** (soffice:17185): WARNING **: Unknown event notification 34 Mar 27 18:53:32 dragonfly gnome-session[1605]: Gjs-Message: JS LOG: Feed scaninbox Error:oAuth.acc_token is undefined Mar 27 18:53:32 dragonfly gnome-session[1605]: Gjs-Message: JS LOG: onTimer :folder is not defined INSTANCE 2: Mar 27 19:01:06 dragonfly gnome-session[1605]: [1:1:0327/190106.317420:ERROR:KeyboardEventManager.cpp(427)] Not implemented reached in static bool blink::KeyboardEventManager::currentCapsLockState() Mar 27 19:01:06 dragonfly gnome-session[1605]: [1:1:0327/190106.318769:ERROR:KeyboardEventManager.cpp(427)] Not implemented reached in static bool blink::KeyboardEventManager::currentCapsLockState() Mar 27 19:01:07 dragonfly gnome-session[1605]: [1:1:0327/190107.192199:ERROR:KeyboardEventManager.cpp(427)] Not implemented reached in static bool blink::KeyboardEventManager::currentCapsLockState() Mar 27 19:02:55 dragonfly dbus[994]: [system] Activating via systemd: service name='org.bluez' unit='dbus-org.bluez.service' Mar 27 19:03:32 dragonfly gnome-session[1605]: Gjs-Message: JS LOG: Feed scaninbox Error:oAuth.acc_token is undefined Mar 27 19:03:32 dragonfly gnome-session[1605]: Gjs-Message: JS LOG: onTimer :folder is not defined ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: gnome-session 3.18.1.2-1ubuntu1.16.04.2 ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44 Uname: Linux 4.4.0-66-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Mar 27 19:07:56 2017 InstallationDate: Installed on 2016-12-27 (90 days ago) InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64 (20160421) PackageArchitecture: all SourcePackage: gnome-session UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1676304/+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
