virtualbox.org

For your information, I just tried with latest debian installer (debian 8.1.0) and it worked. No more screen sizing issue with debian 8 on virtualbox.
I only had the issue with debian installer for debian 8.0.0.

hi,
I have the same issue with:
virtualbox5.0.0
host: windows 8.1
guest: debian Jessie
The maximum resolution in Jessie is 1020*768 (xrandr -q) although my screen has a resolution of 1920*1024
So Jessie is not using the entire screen but just a frame of 1024*768 !

Out of curiosity I installed as second guest linuxmint 17.2 and the resolution problem was gone.
So the problem is coming from the new debian Jessie.

Hope this will be solved soon.

You need to install the guest additions in Jessie. The reason Mint worked is because it comes with guest additions pre-installed.

I confirm that guest addons were installed in the test i made with debian jessie 8.1.0.

Hello,

Thanks for your answers.

I am running virtualbox with windows 8.1 (host)
So I installed the "extension-pack" in windows.
Jessie is the "guest"

I don't understand why I should install the "guest-addons" in Jessie ?
This does not make sense to me.
Could you provide more info please.
Thank you very much

aclarck wrote:
I don't understand why I should install the "guest-addons" in Jessie ?
This does not make sense to me.
Could you provide more info please.
Thank you very much

Guest additions not "guest addons". They are called that because they are additions for the guest, not the host. Which is why they need installed in the guest.
Guest Additions

Ok. The problem is solved. Thanks to you !

Host: win8.1 & virtualbox5
Guest: debian Jessie

The problem was solved by installing the following packages in Jessie (with aptitude):
- virtualbox-guest-dkms
- virtualbox-guest-utils
- virtualbox-guest-x11

I can now use Jessie in full screen (1920*1080)

Thanks a lot.

I solved the issue by installing the package dkms in the debian 8 (jessie) before installing guest additions

sudo apt-get install dkms

then install guest additions, the desktop will resize in the full screen mode.