Description of problem: I was watching a youtube video in firefox and after I tried to change volume mate applet disappeared from system tray. Audio it's still working properly and if I go into "audio" into mate control panel I still manage to change the volume. Version-Release number of selected component: mate-media-1.18.1-2.fc26 Additional info: reporter: libreport-2.9.1 backtrace_rating: 4 cmdline: mate-volume-control-applet crash_function: gtk_widget_get_frame_clock executable: /usr/bin/mate-volume-control-applet journald_cursor: s=c7d1720bd4ac4ee2b3896dd62bd04dd8;i=36b6a;b=4474beb05f9545749a825aa78b2f73f9;m=b2bfe868;t=55b34036180d8;x=fb0ec89049d17341 kernel: 4.13.4-200.fc26.x86_64 rootdir: / runlevel: N 5 type: CCpp uid: 1000 Potential duplicate: bug 1418334
Created attachment 1336813 [details] File: backtrace
Created attachment 1336814 [details] File: cgroup
Created attachment 1336815 [details] File: core_backtrace
Created attachment 1336816 [details] File: cpuinfo
Created attachment 1336817 [details] File: dso_list
Created attachment 1336818 [details] File: environ
Created attachment 1336819 [details] File: limits
Created attachment 1336820 [details] File: maps
Created attachment 1336821 [details] File: open_fds
Created attachment 1336822 [details] File: proc_pid_status
Created attachment 1336823 [details] File: var_log_messages
*** This bug has been marked as a duplicate of bug 1523656 ***