Auto-resize Guest Display and Seamless Mode grayed out DESPITE installing VirtualBoxAddition (Virtual Box 5.2.6, CentOS 7)

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I installed VirtualBoxAddition and i still cant have resolution higher than 800x600 in full-screen mode. I did it in various ways



  • Input , Insert Guest Addition CD, or by downloading iso and opening it from inside VM

  • Then i tried typing in terminal either sudo ./VBoxAddition.run or sh ./VBoxAddition.run

There goes few lines, which last is "Starting Virtual Box Addition" and no errors. After rebooting CentOS, whole VM or even host computer i still cant enable 16:9 resolution by Auto-Resize. I also checked for logs in cd /var/log
There are few of them
- vboxadd-install.log
- vboxadd-setup.log
- vboxadd-setup.log.1
- vboxadd-setup.log.2
- vboxadd-setup.log.3
- vboxadd-setup.log.4
- vboxadd-unintall.log



Inside them: (checked by nano )




  • vboxadd-install



    groupadd: group 'vboxadd' already exists



  • vboxadd-setup.log
    https://pastebin.com/YRXHCZUF



  • vboxadd-setup.log.1



    Removing existing VirtualBox kernel modules.



  • vboxadd-setup.log.2
    pastebin.com/jzkKyRqh


  • vboxadd-setup.log.3
    Removing existing VirtualBox kernel modules.


  • vboxadd-setup.log.4
    https://pastebin.com/8fFvDyGT


vboxadd-uninstall.log is empty.



Could anyone please help me, i dont know what to do to get full screen 16:9 resolution on my computer in Centos & Virtual Box?







share|improve this question
























    up vote
    1
    down vote

    favorite












    I installed VirtualBoxAddition and i still cant have resolution higher than 800x600 in full-screen mode. I did it in various ways



    • Input , Insert Guest Addition CD, or by downloading iso and opening it from inside VM

    • Then i tried typing in terminal either sudo ./VBoxAddition.run or sh ./VBoxAddition.run

    There goes few lines, which last is "Starting Virtual Box Addition" and no errors. After rebooting CentOS, whole VM or even host computer i still cant enable 16:9 resolution by Auto-Resize. I also checked for logs in cd /var/log
    There are few of them
    - vboxadd-install.log
    - vboxadd-setup.log
    - vboxadd-setup.log.1
    - vboxadd-setup.log.2
    - vboxadd-setup.log.3
    - vboxadd-setup.log.4
    - vboxadd-unintall.log



    Inside them: (checked by nano )




    • vboxadd-install



      groupadd: group 'vboxadd' already exists



    • vboxadd-setup.log
      https://pastebin.com/YRXHCZUF



    • vboxadd-setup.log.1



      Removing existing VirtualBox kernel modules.



    • vboxadd-setup.log.2
      pastebin.com/jzkKyRqh


    • vboxadd-setup.log.3
      Removing existing VirtualBox kernel modules.


    • vboxadd-setup.log.4
      https://pastebin.com/8fFvDyGT


    vboxadd-uninstall.log is empty.



    Could anyone please help me, i dont know what to do to get full screen 16:9 resolution on my computer in Centos & Virtual Box?







    share|improve this question






















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I installed VirtualBoxAddition and i still cant have resolution higher than 800x600 in full-screen mode. I did it in various ways



      • Input , Insert Guest Addition CD, or by downloading iso and opening it from inside VM

      • Then i tried typing in terminal either sudo ./VBoxAddition.run or sh ./VBoxAddition.run

      There goes few lines, which last is "Starting Virtual Box Addition" and no errors. After rebooting CentOS, whole VM or even host computer i still cant enable 16:9 resolution by Auto-Resize. I also checked for logs in cd /var/log
      There are few of them
      - vboxadd-install.log
      - vboxadd-setup.log
      - vboxadd-setup.log.1
      - vboxadd-setup.log.2
      - vboxadd-setup.log.3
      - vboxadd-setup.log.4
      - vboxadd-unintall.log



      Inside them: (checked by nano )




      • vboxadd-install



        groupadd: group 'vboxadd' already exists



      • vboxadd-setup.log
        https://pastebin.com/YRXHCZUF



      • vboxadd-setup.log.1



        Removing existing VirtualBox kernel modules.



      • vboxadd-setup.log.2
        pastebin.com/jzkKyRqh


      • vboxadd-setup.log.3
        Removing existing VirtualBox kernel modules.


      • vboxadd-setup.log.4
        https://pastebin.com/8fFvDyGT


      vboxadd-uninstall.log is empty.



      Could anyone please help me, i dont know what to do to get full screen 16:9 resolution on my computer in Centos & Virtual Box?







      share|improve this question












      I installed VirtualBoxAddition and i still cant have resolution higher than 800x600 in full-screen mode. I did it in various ways



      • Input , Insert Guest Addition CD, or by downloading iso and opening it from inside VM

      • Then i tried typing in terminal either sudo ./VBoxAddition.run or sh ./VBoxAddition.run

      There goes few lines, which last is "Starting Virtual Box Addition" and no errors. After rebooting CentOS, whole VM or even host computer i still cant enable 16:9 resolution by Auto-Resize. I also checked for logs in cd /var/log
      There are few of them
      - vboxadd-install.log
      - vboxadd-setup.log
      - vboxadd-setup.log.1
      - vboxadd-setup.log.2
      - vboxadd-setup.log.3
      - vboxadd-setup.log.4
      - vboxadd-unintall.log



      Inside them: (checked by nano )




      • vboxadd-install



        groupadd: group 'vboxadd' already exists



      • vboxadd-setup.log
        https://pastebin.com/YRXHCZUF



      • vboxadd-setup.log.1



        Removing existing VirtualBox kernel modules.



      • vboxadd-setup.log.2
        pastebin.com/jzkKyRqh


      • vboxadd-setup.log.3
        Removing existing VirtualBox kernel modules.


      • vboxadd-setup.log.4
        https://pastebin.com/8fFvDyGT


      vboxadd-uninstall.log is empty.



      Could anyone please help me, i dont know what to do to get full screen 16:9 resolution on my computer in Centos & Virtual Box?









      share|improve this question











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      share|improve this question










      asked Mar 16 at 19:06









      jkes

      63




      63




















          1 Answer
          1






          active

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          up vote
          0
          down vote













          It seems that installation has successfully passed.
          Ensure that you have vboxadd-service.service and vboxadd.service started:



          systemctl -t service|grep vbox


          If services started, then reboot your guest machine. During the boot, when GRUB menu will be showed, press e to edit boot menu entry. Find line with linux16 (kernel parameters line) and put in the end vga=ask, then press Ctrl+x for boot. Therefore the linux kernel ask you to select appropriate graphical mode. If selected mode is convenient for you, save vga=<your_choice> to /boot/grub2/grub.conf for further boots.






          share|improve this answer




















          • Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
            – jkes
            Mar 17 at 1:25










          Your Answer







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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          0
          down vote













          It seems that installation has successfully passed.
          Ensure that you have vboxadd-service.service and vboxadd.service started:



          systemctl -t service|grep vbox


          If services started, then reboot your guest machine. During the boot, when GRUB menu will be showed, press e to edit boot menu entry. Find line with linux16 (kernel parameters line) and put in the end vga=ask, then press Ctrl+x for boot. Therefore the linux kernel ask you to select appropriate graphical mode. If selected mode is convenient for you, save vga=<your_choice> to /boot/grub2/grub.conf for further boots.






          share|improve this answer




















          • Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
            – jkes
            Mar 17 at 1:25














          up vote
          0
          down vote













          It seems that installation has successfully passed.
          Ensure that you have vboxadd-service.service and vboxadd.service started:



          systemctl -t service|grep vbox


          If services started, then reboot your guest machine. During the boot, when GRUB menu will be showed, press e to edit boot menu entry. Find line with linux16 (kernel parameters line) and put in the end vga=ask, then press Ctrl+x for boot. Therefore the linux kernel ask you to select appropriate graphical mode. If selected mode is convenient for you, save vga=<your_choice> to /boot/grub2/grub.conf for further boots.






          share|improve this answer




















          • Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
            – jkes
            Mar 17 at 1:25












          up vote
          0
          down vote










          up vote
          0
          down vote









          It seems that installation has successfully passed.
          Ensure that you have vboxadd-service.service and vboxadd.service started:



          systemctl -t service|grep vbox


          If services started, then reboot your guest machine. During the boot, when GRUB menu will be showed, press e to edit boot menu entry. Find line with linux16 (kernel parameters line) and put in the end vga=ask, then press Ctrl+x for boot. Therefore the linux kernel ask you to select appropriate graphical mode. If selected mode is convenient for you, save vga=<your_choice> to /boot/grub2/grub.conf for further boots.






          share|improve this answer












          It seems that installation has successfully passed.
          Ensure that you have vboxadd-service.service and vboxadd.service started:



          systemctl -t service|grep vbox


          If services started, then reboot your guest machine. During the boot, when GRUB menu will be showed, press e to edit boot menu entry. Find line with linux16 (kernel parameters line) and put in the end vga=ask, then press Ctrl+x for boot. Therefore the linux kernel ask you to select appropriate graphical mode. If selected mode is convenient for you, save vga=<your_choice> to /boot/grub2/grub.conf for further boots.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Mar 16 at 21:42









          Yurij Goncharuk

          2,2582521




          2,2582521











          • Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
            – jkes
            Mar 17 at 1:25
















          • Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
            – jkes
            Mar 17 at 1:25















          Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
          – jkes
          Mar 17 at 1:25




          Thank you a lot but i have few problems. After pressing e on boot screen and pasting vga=over, i could choose few resolutions but not one i need: 1366x768 of my laptop. Resolutions there are either too small or too big, some even makes system unable to boot. I tried editing grub.conf file with "vga=1366x768" but there was no file with this name (only grub.cfg). I wrote this line in grub.cfg and newly made grub.conf but it not helped me. Default resolution is still 4:3 800x600 with black boxes on sides of screen,
          – jkes
          Mar 17 at 1:25












           

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