I can start none of
The output is
bus error (core dump created), though both of them are re-installed already. On my MacBookPro6,2 with Ubuntu 16.04.5, I also do not see the battery icon. When I try to open the "system settings" via the main menu top right then nothing will happen.
Analyzing the problem, I tried
$ sudo apt-cache depends unity-control-center and the prompt was (translated status words from German):
unity-control-center Depends: libaccountsservice0 Depends: libatk1.0-0 Depends: libc6 Depends: libcairo2 Depends: libcanberra-gtk3-0 Depends: libcanberra0 Depends: libcheese-gtk25 Depends: libcheese8 Depends: libcolord2 Depends: libcups2 Depends: libdbus-glib-1-2 Depends: libfcitx-config4 Depends: libfcitx-gclient0 Depends: libfcitx-utils0 Depends: libfontconfig1 Depends: libgdk-pixbuf2.0-0 Depends: libgeonames0 |Depends: libgl1-mesa-glx Depends: <libgl1> libgl1-mesa-glx Depends: libglib2.0-0 Depends: libgnome-desktop-3-12 Depends: libgnome-menu-3-0 Depends: libgtk-3-0 Depends: libgtop-2.0-10 Depends: libibus-1.0-5 Depends: libkrb5-3 Depends: libnm-glib4 Depends: libnm-gtk0 Depends: libnm-util2 Depends: libnotify4 Depends: libpango-1.0-0 Depends: libpangocairo-1.0-0 Depends: libpolkit-gobject-1-0 Depends: libpulse-mainloop-glib0 Depends: libpulse0 Depends: libpwquality1 Depends: libtimezonemap1 Depends: libunity-control-center1 Depends: libunity-settings-daemon1 Depends: libupower-glib3 Depends: libwacom2 Depends: libwebkit2gtk-4.0-37 Depends: libx11-6 Depends: libxi6 Depends: libxml2 Depends: accountsservice Depends: apg Depends: desktop-file-utils desktop-file-utils:i386 Depends: gkbd-capplet Depends: gnome-desktop3-data Depends: adwaita-icon-theme Depends: gnome-menus Depends: unity-settings-daemon Depends: gnome-settings-daemon-schemas Depends: gsettings-desktop-schemas Depends: gsettings-ubuntu-schemas Depends: ibus ibus:i386 Depends: indicator-bluetooth Depends: indicator-datetime Depends: indicator-keyboard Depends: indicator-power Depends: indicator-sound Conflicts: gnome-control-center Conflicts: <gnome-control-center-unity> Conflicts: <unity-control-center-datetime> Damaged: compiz Damaged: gnome-bluetooth Damaged: gnome-power-manager Damaged: gnome-session Damaged: libglib2.0-0 Damaged: metacity Damaged: unity Recommends: cups-pk-helper Recommends: gnome-session-bin Recommends: ubuntu-system-service Recommends: ibus ibus:i386 Recommends: iso-codes Recommends: mousetweaks Recommends: policykit-1-gnome lxpolkit mate-polkit Recommends: libcanberra-pulse Recommends: system-config-printer-gnome Recommends: unity-control-center-faces |Suggests: gnome-screensaver Suggests: xscreensaver |Suggests: gnome-user-guide Suggests: ubuntu-docs Suggests: libcanberra-gtk-module Suggests: x11-xserver-utils Replaces: gnome-bluetooth Replaces: <gnome-control-center-unity> unity-control-center Replaces: <unity-control-center-datetime> unity-control-center
I have already tried
$ sudo apt-get --reinstall install compiz $ sudo apt-get --reinstall install gnome-power-manager $ sudo apt-get remove unity-control-center $ sudo apt-get install unity-control-center $ sudo apt-get remove gnome-control-center $ sudo apt-get install gnome-control-center
none of which did affect any changes to the prompt above.
Previously, I had removed Firefox (is re-installed now) and I have already tried several graphics driver installations, because other similar issues let me believe that this was mainly an NVIDIA problem - but I am no more sure about this now. I did read many related issues, none of which has set me on the solution track.
How can I repair the control center?
EDIT 1: I realized that, after setting
/etc/xdg/autostart/indicator-power.desktop, the battery icon appears at startup, before I'm being logged in. So, it's generally available in my system installation, but my user configuration seems to stop it.
EDIT 2: I'm using
$ snap list shows:
Name Version Rev Tracking Publisher Notes core 16-2.35.4 5662 stable canonical✓ core vlc 3.0.4 555 stable videolan✓ -
EDIT 3: All system applications, the Control Center, the Battery Icon and also Rhythmbox show the following line in the Ubuntu exception window:
Title: ... crashed with signal 7 in gst_update_registry()
So, I'm currently searching the issue in the field of GStreamer - which I do not know up to now - any hint is welcome. Thanks.
EDIT 4: Meanwhile, I've uninstalled and re-installed GStreamer:
$ sudo apt-get purge gstreamer1.0-tools $ sudo apt-get purge libgstreamer1.0-0 $ sudo apt-get install libgstreamer1.0-0 $ sudo apt-get install gstreamer1.0-tools $ sudo apt install gstreamer1.0-plugins-good $ sudo apt install gstreamer1.0-plugins-base $ sudo apt autoremove
It seems to me my Ubuntu acts quicker since, but there's no visible effect on the availability of the system applications that I am still missing.