Unfortunately, xrandr failed to work for me. NOTE: I have VirtualBox 4.3.10 and Ubuntu 14.04 amd64 and guest additions don't work properly on it for me too, so I assume I will have to wait for next VBox version. Without the successful installation of guest additions, VirtualBox does not re-adjust guest resolution automatically, so graphics inside VM may look grainy/broken on bigger screen. Was the installation of guest additions successful? You can check this by going to View menu and see if 'Auto-resize guest display' is enabled.
Pressing right Ctrl + F will toggle full screen of that monitor. wait for it to do it's business and then restart the Guest OSĪfter you run this, VirtualBox should automatically resize the Guest resolution to the window size.run the n script within the newly mounted cd.Mount the Guest Additions by selecting Devices -> Insert Guest Additions CD image.In order to enable the native resolution of your monitor you'll need to properly install the Guest Additons. When using VirtualBox the default resolutions are limited to just a few common resolutions. Once you set the resolution in the VM, VirtualBox will automatically resize its window on the host.īy the way, here's the official Ubuntu documentation about changing the screen's resolution. Now run xrandr -output -size and replace "output" and "size" with the connected output that you got from the previous command (in this case VGA1) and the resolution you want to set, I recommend setting it just a bit lower than your actual monitor to leave space for the taskbar and Virtualbox window title bar.Įxample : xrandr -output VGA1 -size 1920x1040. VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
If you manually resize the window on the host you'll only zoom on the image returned by the VM, so of course this gives a very bad image quality.Ĭhange the screen's resolution in the VM's configuration, either via the GUI, or directly via the command line with xrandr.įirst run xrandr with no arguments, it'll display all outputs (in this case they're just the virtual outputs emulated by VirtualBox).
The window size is controlled by the VM's screen resolution.
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