I just restored the left panel of Ubuntu using the post: Unity doesn't load, no Launcher, no Dash appears, but the icons on the top-right corner in the Panel are still invisible.

example of missing icons

I have searched but I haven't found anything that works for me on Ubuntu 14.04.

  • Try to update your system and restart your system. – vembutech Dec 19 '14 at 5:42
  • How to update my system? I have restarted thousands of times. – user280121 Dec 19 '14 at 5:48
  • Do you mean run "Software Updater"? I have done that. No use. – user280121 Dec 19 '14 at 5:49
  • Try the command "restart unity-panel-service" in terminal – vembutech Dec 19 '14 at 6:50
  • tried, but error: "restart: Unknown job: unity-panel-service" – user280121 Dec 19 '14 at 6:55

By an accident I am unaware of, I selected lxdm as the display manager so an ugly blue login page comes out every time I tried to log in, as described in this question: How to remove the ugly blue log in?. Now I run sudo dpkg-reconfigure lightdm and select lightdm as the display manager, all things I am familiar with come back again, including the lovely icons in the topbar.

PS: by executing sudo apt-get remove lxdm, we can completely remove that ugly blue login window forever.

Thank Seth for his help.

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