Created attachment 112873 [details] syslog I updated today libkf5screen7. I have previously the version: 4:5.12.5-0neon+16.04+xenial+build60 Now I have the version: 4:5.12.5-0neon+16.04+xenial+build61 So, only build number change. After this upgrade, all icons in the system tray (where we have sound icon, networkmanager icon, ...) which are not part of KDE base are not shown anymore (for example the nextcloud client icon and clementine icon). Also, when we plug in a device, click to "Open with dolphin" has no more effect. In /var/log/syslog, I notice some logs which could help to find the problem. I add these line as attachment to this bug report. So, my only solution is to downgrade this package to build 60 until a fix is published.
Let's assume it was caused by the incorrect update. If not, please reopen. *** This bug has been marked as a duplicate of bug 394679 ***