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There are many questions about resolution issues on askubuntu but no question/solution seems to solve my issue.

I've a 12.04/precise host system and installed Ubuntu 12.04/precise as guest system as well. After installation I had the option of selecting 1024x768 (4:3) and 800x600 (4:3) as resolution in display settings. After installing guest additions the options 1280x960 (4:3) and 1440x1050 (4:3) was added to the list. Now 4 in total all having the 4:3 ratio.

I then activated full screen mode (host+f) and got the guest running in native 1920x1200 (16:10) for my screen. After deactivating full screen two more options had been added to the resolutions dropdown list, 1920x1200 (16:10) and 1600x1200 (4:3).

I want to run the guest in 1920x1080 (16:9) so I can easily record screencasts in "full-hd". Last time I had this problem the solution was to run "VBoxManage controlvm nameofyourVM setvideomodehint width height colordepth" command from the host but now I want to know if there is any easier way to solve this?

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5 Answers

Just install Virtualbox Guests Additions but before be sure you have DKMS in terminal:

sudo apt-get install dkms

and update:

sudo apt-get update

sudo apt-get upgrade

after this install guests additons,restart pc and you got the right screen ratio.

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I'm afraid that didn't help me. As I said in the first post Guest additions are already installed. –  CHolmstedt Nov 6 '12 at 6:37
    
In my case, I upgraded VirtualBox then upgraded Ubuntu, and somewhere along the line the guest additions seemed to stop working (the screen wasn't resizing). I reinstalled the guest addditions which upgraded them to the latest version, rebooted the guest VM, and everything started working again (could change the VM resolution). –  jfritz42 Nov 12 '12 at 18:17
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I too had the same issue. I installed dkms and then installed the Linux headers as per @Daniel answer. Then rebooted Ubuntu while remaining in full screen mode and it switched straight to the correct 16:9 resolution.

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  1. Install VirtualBox tools
    Check before this manual
    https://www.virtualbox.org/manual/ch04.html#idp49439248

  2. Reboot.
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I had the same issue, but now it works. I had to install:

sudo apt-get install linux-headers-`uname -r`

The error was logged in: /var/log/vboxadd-install.log

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Thanks for the response. I will try that. –  CHolmstedt Jul 5 '13 at 17:06
    
@CHolmstedt So did it work? –  Daniel Oct 26 '13 at 7:01
    
@Daniel No, I'm afraid not. I have not found any solution that works for my problem yet. –  CHolmstedt Oct 27 '13 at 7:45
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I had the same issue, i installed fresh ubuntu, then updated all packages + dkms, then rebooted in fullscreen. Installed the Guest Additions while being in fullscreen mode, and rebooting in fullscreen...

This fixed it for me.

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