Ubuntu 16.04 LTS boot menu dissapear after several use of computer

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After installing ubuntu in my machine (fully installed and no windows os currently residing in the disk).



At first when installation is done, ubuntu would normally load and is working fine that i could see the boot menu order.



boot priority #1 ubuntu
boot priority #2 SATA DISK


But after resting the computer or after several reboot ubuntu boot menu wont up show anymore and i always got this message



Reboot and Select proper Boot device
or Insert Boot Media in selected Boot device


I followed the instruction here to get boot-info and here is the output: http://paste.ubuntu.com/p/S4xdSWCBrb/



When i try to format my computer again and reinstall ubuntu the menu stated that ubuntu 16.04 LTS currently exist in the disk and ask me to erase and reinstall again or install ubuntu 16.04 LTS alongside ubuntu 16.04 LTS.



I also notice that whenever it happens the bios menu configurations are resetting.



I need some help.










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    up vote
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    down vote

    favorite












    After installing ubuntu in my machine (fully installed and no windows os currently residing in the disk).



    At first when installation is done, ubuntu would normally load and is working fine that i could see the boot menu order.



    boot priority #1 ubuntu
    boot priority #2 SATA DISK


    But after resting the computer or after several reboot ubuntu boot menu wont up show anymore and i always got this message



    Reboot and Select proper Boot device
    or Insert Boot Media in selected Boot device


    I followed the instruction here to get boot-info and here is the output: http://paste.ubuntu.com/p/S4xdSWCBrb/



    When i try to format my computer again and reinstall ubuntu the menu stated that ubuntu 16.04 LTS currently exist in the disk and ask me to erase and reinstall again or install ubuntu 16.04 LTS alongside ubuntu 16.04 LTS.



    I also notice that whenever it happens the bios menu configurations are resetting.



    I need some help.










    share|improve this question























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      After installing ubuntu in my machine (fully installed and no windows os currently residing in the disk).



      At first when installation is done, ubuntu would normally load and is working fine that i could see the boot menu order.



      boot priority #1 ubuntu
      boot priority #2 SATA DISK


      But after resting the computer or after several reboot ubuntu boot menu wont up show anymore and i always got this message



      Reboot and Select proper Boot device
      or Insert Boot Media in selected Boot device


      I followed the instruction here to get boot-info and here is the output: http://paste.ubuntu.com/p/S4xdSWCBrb/



      When i try to format my computer again and reinstall ubuntu the menu stated that ubuntu 16.04 LTS currently exist in the disk and ask me to erase and reinstall again or install ubuntu 16.04 LTS alongside ubuntu 16.04 LTS.



      I also notice that whenever it happens the bios menu configurations are resetting.



      I need some help.










      share|improve this question













      After installing ubuntu in my machine (fully installed and no windows os currently residing in the disk).



      At first when installation is done, ubuntu would normally load and is working fine that i could see the boot menu order.



      boot priority #1 ubuntu
      boot priority #2 SATA DISK


      But after resting the computer or after several reboot ubuntu boot menu wont up show anymore and i always got this message



      Reboot and Select proper Boot device
      or Insert Boot Media in selected Boot device


      I followed the instruction here to get boot-info and here is the output: http://paste.ubuntu.com/p/S4xdSWCBrb/



      When i try to format my computer again and reinstall ubuntu the menu stated that ubuntu 16.04 LTS currently exist in the disk and ask me to erase and reinstall again or install ubuntu 16.04 LTS alongside ubuntu 16.04 LTS.



      I also notice that whenever it happens the bios menu configurations are resetting.



      I need some help.







      boot grub2






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Mar 10 at 1:19









      Roel

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