Public bug reported: Since upgrade from 17.10 to 18.04 icons of qt-based apps like Telegram, VLC (Qt5), GoldenDict (Qt4) not appears in notification area applet. Reset panel settings doesn't help. In 17.10 these icons appeared.
$ lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 $ apt-cache policy mate-panel mate-panel: Установлен: 1.20.1-3ubuntu1 Кандидат: 1.20.1-3ubuntu1 Таблица версий: *** 1.20.1-3ubuntu1 500 500 http://mirror.yandex.ru/ubuntu bionic/universe amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: mate-panel 1.20.1-3ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-41.46-generic 4.13.16 Uname: Linux 4.13.0-41-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: MATE Date: Wed May 16 13:32:48 2018 InstallationDate: Installed on 2017-06-05 (344 days ago) InstallationMedia: Ubuntu-MATE 17.04 "Zesty Zapus" - Release amd64 (20170412) SourcePackage: mate-panel UpgradeStatus: Upgraded to bionic on 2018-05-15 (1 days ago) ** Affects: mate-panel (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic third-party-packages ** Summary changed: - No icons of Qt-based apps in notification area applet + Icons of Qt-based apps does not appear in notification area -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771528 Title: Icons of Qt-based apps does not appear in notification area To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mate-panel/+bug/1771528/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs