I have been repeatedly getting an error upon logging into Ubuntu MATE saying that my "indicator applet complete" has quit unexpectedly. I can choose to reload it which fixes it, but when I reboot the computer or log out and log back in, the error comes back. I have found that running killall mate-panel once the error comes up will work to fix it. I tried making the computer run killall mate-panel every time I log in, but it doesn't always work correctly and when it does work, the error will show up for a second or two before the command runs and resets the panel, getting rid of the error. By the way, I am running Ubuntu MATE 18.04. If anybody knows a solution, please share.

UPDATE: my MATE Tweak window has these options available to me: MATE Tweak panel settings

  • If anybody has any ideas whatsoever, please share. I really need to find a solution to this problem Mar 7 '19 at 18:04
  • Try to run MATE Tweak with mate-tweak, then toggle all indicators from Panel (Interface) -> Enable indicators.
    – N0rbert
    Mar 7 '19 at 19:25
  • What do you mean? I'm in MATE tweak, but what do you mean by toggling all indicators? Mar 7 '19 at 20:31
  • I mean this checkbox (ran on 16.04 LTS, but 18.04 should have similar). Try to uncheck it and then check again.
    – N0rbert
    Mar 7 '19 at 20:34
  • 1
    I tried re-installing the "indicator applet complete" package, which did not fix anything. I might try re-installing the whole mate panel? I don't know if that would be very effective, and I'm concerned it might mess up some other stuff. Anyway, I'll ask around on the ubuntu-mate community and see if I can get any answers. Mar 7 '19 at 20:54

I was looking at a file called .x11errors in my home directory and found that indicator-applications couldn't load.
This is because


was set to root privilege and should be user privilege. After that, my indicator-applet-complete errors no longer showed.

  • Thank you. I assume this would work, so I marked it as correct, but I have since re-installed Ubuntu MATE and the problem no longer persists. Thank you very much! Sep 16 '19 at 14:18
  • doesn't work for me. I tried even: chwon nobody:nogroup with 0666.
    – dawciobiel
    Mar 19 '20 at 18:39

This workaround works. Put the script in your Startup Programs. @dawciobiel

# Simulate Return key
sleep 5

xte 'key Return'

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