just realized: the calender pane is still shown in my tb, but without any content. so tb realizes that lightning is installed, but messing something else up here. but nonetheless, my longtime experience with ubuntu tells me it must at least be closely related to the above mentioned bug.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1228906 Title: Lightning not available even though xul-ext-lightning is installed Status in “thunderbird” package in Ubuntu: Confirmed Bug description: After the update of Thunderbird and Lightning from version 17 to 24, Thunderbird does not show anymore the calendar pane or tab. All the calendar function that should be made available from Lightning are not available even from the menus. It seems that Thunderbird does not realize that the Lightning add-on is available system-wide. The add-ons pane shows that no add-ons are installed. In the previous versions system-wide add-ons were displayed along the others installed by the user. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xul-ext-lightning 1:24.0+build1-0ubuntu0.12.04.1 ProcVersionSignature: Ubuntu 3.5.0-40.62~precise1-generic 3.5.7.20 Uname: Linux 3.5.0-40-generic i686 AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25. ApportVersion: 2.0.1-0ubuntu17.4 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gioele 1674 F.... pulseaudio /dev/snd/pcmC0D0p: gioele 1674 F...m pulseaudio BuildID: 20130913150425 CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfe9f4000 irq 43' Mixer name : 'Realtek ALC883' Components : 'HDA:10ec0883,1462f603,00100002' Controls : 49 Simple ctrls : 22 Channel: Unavailable Date: Sun Sep 22 20:15:19 2013 ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 10.04.2 LTS "Lucid Lynx" - Release i386 (20110211.1) IpRoute: default via 192.168.61.1 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.61.0/24 dev eth0 proto kernel scope link src 192.168.61.21 metric 1 IwConfig: sit0 no wireless extensions. lo no wireless extensions. eth0 no wireless extensions. MarkForUpload: True PrefSources: prefs.js ProcEnviron: LANGUAGE=en_US:en TERM=xterm PATH=(custom, no user) LANG=it_IT.utf8 SHELL=/bin/bash Profiles: Profile0 (Default) - LastVersion=24.0/20130913150425 (In use) RelatedPackageVersions: adobe-flashplugin 11.2.202.310-0precise1 rhythmbox-mozilla 2.96-0ubuntu4.3 totem-mozilla 3.0.1-0ubuntu21.1 RfKill: RunningIncompatibleAddons: False SourcePackage: thunderbird UpgradeStatus: Upgraded to precise on 2013-05-24 (120 days ago) dmi.bios.date: 101507 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V3.5 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: MS-7276 dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV3.5:bd101507:svnToBeFilledByO.E.M.:pnMS-7276:pvr1.0:rvnMSI:rnMS-7276:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: MS-7276 dmi.product.version: 1.0 dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1228906/+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