The systemtray( right top system bar) coming with a blank button, how to fix it?

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I'm using Ubuntu 16.04LTS and already update to date.The right top system bar coming with a blank button, click that button will show a blank menu(I mean a menu with no content, but only contains border.). Is anyone can tell me how to fix this problem?



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    up vote
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    down vote

    favorite












    I'm using Ubuntu 16.04LTS and already update to date.The right top system bar coming with a blank button, click that button will show a blank menu(I mean a menu with no content, but only contains border.). Is anyone can tell me how to fix this problem?



    enter image description here










    share|improve this question

























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm using Ubuntu 16.04LTS and already update to date.The right top system bar coming with a blank button, click that button will show a blank menu(I mean a menu with no content, but only contains border.). Is anyone can tell me how to fix this problem?



      enter image description here










      share|improve this question















      I'm using Ubuntu 16.04LTS and already update to date.The right top system bar coming with a blank button, click that button will show a blank menu(I mean a menu with no content, but only contains border.). Is anyone can tell me how to fix this problem?



      enter image description here







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      edited Feb 5 at 14:58









      dobey

      32k33585




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      asked Feb 3 at 2:51









      Y.Elva

      11




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          That looks like it is an application indicator. You have some process running which is adding the indicator. Find and terminate the process which is providing a blank indicator, and it will go away.






          share|improve this answer




















          • I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
            – Y.Elva
            Feb 4 at 3:21










          • App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
            – dobey
            Feb 5 at 14:58










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          1 Answer
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          active

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          1 Answer
          1






          active

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          active

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          active

          oldest

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          up vote
          0
          down vote













          That looks like it is an application indicator. You have some process running which is adding the indicator. Find and terminate the process which is providing a blank indicator, and it will go away.






          share|improve this answer




















          • I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
            – Y.Elva
            Feb 4 at 3:21










          • App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
            – dobey
            Feb 5 at 14:58














          up vote
          0
          down vote













          That looks like it is an application indicator. You have some process running which is adding the indicator. Find and terminate the process which is providing a blank indicator, and it will go away.






          share|improve this answer




















          • I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
            – Y.Elva
            Feb 4 at 3:21










          • App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
            – dobey
            Feb 5 at 14:58












          up vote
          0
          down vote










          up vote
          0
          down vote









          That looks like it is an application indicator. You have some process running which is adding the indicator. Find and terminate the process which is providing a blank indicator, and it will go away.






          share|improve this answer












          That looks like it is an application indicator. You have some process running which is adding the indicator. Find and terminate the process which is providing a blank indicator, and it will go away.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Feb 3 at 2:56









          dobey

          32k33585




          32k33585











          • I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
            – Y.Elva
            Feb 4 at 3:21










          • App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
            – dobey
            Feb 5 at 14:58
















          • I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
            – Y.Elva
            Feb 4 at 3:21










          • App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
            – dobey
            Feb 5 at 14:58















          I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
          – Y.Elva
          Feb 4 at 3:21




          I tried to find such a process that produce a redundant indicator, but not take effect. Here is what I do: kill all other gui software, using the default ubuntu theme and icons. I remember this phenomenon happended when last week I installed all the updates from ubuntu source and reboot. Anyway, it does not block me from using my computer.
          – Y.Elva
          Feb 4 at 3:21












          App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
          – dobey
          Feb 5 at 14:58




          App indicators don't necessarily come from "GUI" applications which exist in the applications menu. Like dropbox for example.
          – dobey
          Feb 5 at 14:58

















           

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