How to Change Screen Resoulation

[joegreen690]

Hi there,

I'm using the VritualBox 4.3.20 on Win 7 pro 64-bit and I created a VM for Fedora 21 64-bit. My Win 7 screen resolution is 1980x1080 but Fedora shows me only 2 options - 800x600 and 1024x768. How do I change Fedora's screen resolution to same as my host OS resolution that is 1980x1080.

Thanks

Joe Green

[loukingjr]

install the guest additions in your Fedora guest.

[joegreen690]

I added guest addition and it gave me a few more resolutions but all of them have aspect ration of 4:3 whereas my host aspect ratio is 16:9. So even with the new resolutions, my guest full-screen has bars on left and right.

[loukingjr]

It sounds like the guest additions didn't install correctly. I have a Fedora 20 and a Fedora 21 guest and they both resize to my screen. 16:9 (2560 x 1440)

[socratis]

VBoxManage controlvm "Your VM" setvideomodehint 1280 720 32
VBoxManage controlvm "Your VM" setvideomodehint 1366 768 32

Either of these two commands will give you a 16:9 resolution, which is what your host has (btw, it is 1920x1080, not 1980x1080, right?). If you want your VM to take advantage of the host's full resolution, your VM cannot be in windowed-mode, it has to be full screen. Try pressing Host-F...

[chapeaubleu]

Hi,

a simple way is to start VirtualBox and, before starting the guest machine, select "File"-"Preferences"-"Display".
There you find the screen resolution fields where you can put in the values of your host system.

Thereafter, when starting the guest, you select the full screen mode.

It took a long time until I found it. What I am missing is a sort of Quick Installation Guide. Reading the several hundred pages of the manual takes too much time...

[socratis]

@chapeaubleu
Using custom guest resolutions is, in my humble opinion, not a part of the 'Quick Installation Guide' that you may have in mind. There are Chapters 1.7 and 1.8 which do cover the basics (get up and running). If you believe that there should be something else, by all means start a thread called 'Quick Installation Guide' and I'm pretty sure that the Technical Writers will pick it up

[loukingjr]

I added guest addition and it gave me a few more resolutions but all of them have aspect ration of 4:3 whereas my host aspect ratio is 16:9. So even with the new resolutions, my guest full-screen has bars on left and right.

As I mentioned it doesn't sound like the guest additions installed correctly. First you need to install the dkms and kernel-devel package in Fedora. If you installed the guest additions from the Fedora repository you need to remove those and install them from the VirtualBox Devices drop down menu>Insert Guest Additions CD Image…

[mani1982]

I had to restart my fedora 22 for guest addition to take effect. Perhaps it has to start some daemon process to work.