virtualbox.org

Hello,

I have installed CentOS7 on virtual box, host system is Win8.1. It runs but it does not recognize the screen. It shows only as "unknown display" and the resolution is very low 1024x768. How can I fix it? My graphic card is listed as "Intel HD Graphics" in Device manager on windows.
Thanks.

Post the guests log file ( as an attachment ). Right click on the guest in the Main Manager then click show log. Save and post as an attachment. Compress if it is too large to post.

Also did you install the guest additions ( in the guest )?

BTW, your virtual computer will display information about its virtual display and its virtual graphics card.

Perryg wrote:Post the guests log file ( as an attachment ). Right click on the guest in the Main Manager then click show log. Save and post as an attachment. Compress if it is too large to post.

Also did you install the guest additions ( in the guest )?

Yes, I installed guest additions.

My log is here as attachment.

According to the log file you have not installed the guest additions ( in the guest ) or it did not install properly. Try it again and post the log file again.

Ok,
It was correct, guest additions are not properly installed, because I upgraded kernel version from 3.10 to 4.10 and tried to install guest additions on version 4.10. I installed it on version 3.10 and it worked.
Why guest additions are not installed properly on version 4.10 is a different issue.
Thanks.