I use the software with versions:
- Ubuntu host : 18.04
- Virtualbox: 6.1
- Virtualbox client: win10
I installed this and Win10 client runs, but wit limited screen size. My monitor has 1680 * 1050 pixels, but Windows Client shows only 1024 * 768 pixels. In Windows client I selected the Virtualbox menu -> View -> Virtual screen 1 which shows a disabled list with multiple monitor sizes with 1024* 768 selected. But I can not change this value.
I read I have to install Guest addition ISO but on https://www.virtualbox.org/manual/UserManual.html#additions-windows I could not find this file. Nor on https://www.virtualbox.org/wiki/Linux_Downloads
I have read How to copy between guest OS (Windows 7) running inside Oracle virtual machine 5.0 to host OS (CentOS Release 4.0 final) and Thorian93 answer, but he pointed to a pages where I could not found the guest additions.
- Can the Win10 screen size be resized to full screen, without Guest Additions? If so how?
- If this is not possible, where can the proper guest additions be found?
Update 1 :
I installed from page https://www.virtualbox.org/wiki/Download "VirtualBox 6.1.18 Oracle VM VirtualBox Extension Pack" which has "Guest additions" in it. Which seems to be successful.
In VirtualBox server, I selected the Win10 client -> Settings _. Storage -> And added VBoxGuestAdditions.iso as optical storage.
I started Win10 VBoxVlient -> VirtualBox menu -> Devices -> Optical Devices. And I saw a list with VBoxGuestAdditions.iso in it with a selected checkbox. So this seems to be ok.
But the screen size is not full screen yet.
In Win10 VBoxClient -> VirtualBox menu -> View -> Virtual Screen 1, still I different screen sizes where disabled.
To see if the extension pack was properly installed I run:
bernard@p10:~$ VBoxManage list extpacks Extension Packs: 1 Pack no. 0: Oracle VM VirtualBox Extension Pack Version: 6.1.18 Revision: 142142 Edition: Description: Oracle Cloud Infrastructure integration, USB 2.0 and USB 3.0 Host Controller, Host Webcam, VirtualBox RDP, PXE ROM, Disk Encryption, NVMe. VRDE Module: VBoxVRDP Usable: true Why unusable: bernard@p10:~$
I checked if the guest addition was really installed on Win10:
VBoxManage showvminfo VBox_Win10
with as (stripped) result:
Video mode: 1024x768x32 at 0,0 enabled Guest:
This seems to imply guest additions in known to VirtualBox, is visible in the Client (Virtualbox menu -> Devices -> Optical Drives -> VBoxQuestAdditions.iso is checked) but can not be installed (Virtualbox menu -> Devices -> Insert Guest Addition CD Image does not respond)