virtualbox.org

Hi,

I would like to adjust the screen resolution for my Debian 8.1 Virtual Machine, from 1024x768 to 1366x768 (which for me would be full screen). This machine is running in VirtualBox 5 on 64-bit Windows 10, if you think this is a Windows 10-specific problem well I received the free upgrade from Windows 7 and when running Windows 7 I had the same issue with my Fedora machine (although it was only after the upgrade I setup my Debian machine) and I haven't noticed any new VirtualBox issues since upgrading, so I somehow doubt Windows 10 is to blame. Neither "Seamless Mode" nor "Auto-resize Guest Display" options are allowed under the, "View" drop-down menu. I have six other Virtual machines installed on my PC, for each of the following OSs (each 64-bit):

• Fedora 22
• Linux Mint 17.2
• Mageia 5
• Manjaro Linux 0.8.13.1
• openSUSE 13.2
• Sabayon Linux 15.08

all but the Fedora 22 machine runs seamless mode just fine (i.e., full screen occupies all 1366x768 pixels of my screen and not just 1024x768 of it). Fedora 22 has the same issue as Debian: it runs 1024x768 screen resolution, when it is supposed to be occupying the whole screen. I have attempted to change the screen resolution from within the guest machine itself, but I notice for both Debian and Fedora 1024x768 is the largest display they are allowing. If you are wondering why I am mentioning this Fedora glitch, it is in case it helps you in solving my problem with my Debian machine, this question is just about the Debian machine (although if your answer is applicable to the Fedora machine too a brief mention of this fact would be appreciated). I have installed the Oracle VM VirtualBox Extension Pack (version 5.0.0r101573), if you are wondering. I have enabled 3D acceleration and bidirectional clipboard (although the clipboard does not appear to be working for either machine) with 64 MB display memory, 4096 MB RAM, 64 GB HDD (for Debian, that is; Fedora is using 128 GB) and any other helpful detail I will be happy to provide. Keep in mind my programming and technical knowledge is limited, so please keep the technical discourse in your answer to a minimum.

This question has also been posted on the Unix & Linux StackExchange, in case you would rather answer in that medium.

Thanks for your time,
Brenton

I found the solution, it turns out that I didn't install the guest additions within the VM properly, I just assumed that inserting the disk would suffice by itself, but instead I found this guide helpful. See Unix & Linux SE for further details.