Higher screen resolution in VirtualBox?

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Computer Type PC/Desktop
System Manufacturer/Model Number Custom self built
OS 64-bit Windows 10
CPU Intel i7-3930K 3.2 Ghz (O/C to 4 Ghz)
Motherboard ASRock X79 Extreme11
Memory 32 GB (8GBx4) G.SKILL DDR3 Quad PC3-19200 2400 MHz
Graphics Card MSI N760 TF 4GB5/OC GTX 760 4GB
Sound Card SB Recon 3Di Integrated Chip
Monitor(s) Displays 3 x 27" Asus VE278Q
Screen Resolution 1920x1080

Keyboard Logitech wireless K800
Mouse Logitech MX Master
PSU OCZ Series Gold OCZZ1000M 1000W
Case Thermaltake Level 10 GT Snow Edition
Cooling Corsair Hydro H100
Hard Drives 256GB OCZ Vector 6TB WD Black WD6001FZWX
Internet Speed 100 Mb/s Download and 10 Mb/s Upload
Browser Internet Explorer 11
Antivirus Malwarebyte Anti-Malware Premium
Other Info Lite-On iHBS212 12x BD Writer Microsoft LifeCam Cinema Samsung CLX-3175FW Printer Netgear Nighthawk X6 R8000 Router Arris SB6183 Cable...

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If you install Ubuntu 14.04 inside a Hyper-V virtual machine – you automatically get all the integration components and virtualized drivers. Including the Hyper-V video driver. However, if you try to change the screen resolution inside your virtual machine you will notice something odd:

There is only one choice!

Luckily, you can change the screen resolution. Just not here. What you need to do is:

Open Terminal Type: sudo vi /etc/default/grub Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT, and add video=hyperv_fb:[the resolution you want]. The resolution I want is 1280x720. So my line ends up looking like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1280x720" Write the changes and quit vi. Run: sudo update-grub Reboot the virtual machine

Now you will get the resolution that you want!


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This article was originally posted on the forum.

On my test installations of Ubuntu 14.04 in VirtualBox, I had to figure out how to deal with a situation where the highest screen resolution I could get was 640 x 480. And it was not just with Ubuntu 14.04, but also with Kubuntu 14.04.

UPDATE: This also applies to Ubuntu 14.10.

This image shows the output of the xrandx command.

Here’s what it looks like from the Display module of System Settings. That’s not good. I found that there are two solutions to the problem.

1. Use Xdiagnose From the Dash, search for and launch Xdiagnose, then enable all the options under the Debug section. Click the Apply button, then close the window and restart the system. You’ll have to restart. Logging out, then in won’t do.

2. Additional Drivers Also from the Dash, search for and start Software Updates. Click on the Additional Drivers tab, then click on the Using x86 virtualization solution…....

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Virtualization offers you a great opportunity to set a virtual environment to test different operating systems without the hazard of damaging the main (or host) operating system. However, sometimes the installed system acts different in the virtualized environment. For example, the installed Ubuntu in VirtualBox by default sets the 800x600 screen resolution.

Even if the user activates the full screen mode, the resolution still remains the same. Unfortunately, if you open the Screen Resolution dialog (System > Preferences > Screen Resolution) from the Ubuntu menu, you won’t see any suitable high resolution picks.

However, there is a solution for this problem. First of all, before starting the virtual Ubuntu environment, check if there are no images mounted in the virtual CD/DVD drive for the current virtual machine.

Now start the Ubuntu virtual machine. When the Ubuntu OS is completely loaded, make sure the mouse is not being captured by the guest environment...

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I've just installed Ubuntu 10.04 into VirtualBox on Windows 7.

Unfortunately the only options showing for screen resolution are 640x480 and 800x600 and the monitor is showing as 'Unknown'.

How would I go about upping the resolution to 1280x1024 (I'm on a 1600x1200 monitor)?

I tried mounting the VirtualBox 'Guest Additions' ISO (from the VBox 'Devices' menu) and doing sudo sh ./VBoxLinuxAdditions-x86.run from the mounted drive, which gave 2 new listed resolutions after a reboot (1024x768 and the 16:9 version of that resolution). These worked when I selected them but disappeared when I switched back to another resolution. I tried rebooting and running VBoxLinuxAdditions-x86.run again but onlu the 2 low res options listed this time.
I think I'm going to reinstall...

Seems to be a VBox problem rather than an Ubuntu problem as after reinstalling 10.4 overwriting the original virtual partition, sudo sh ./VBoxLinuxAdditions-x86.run now has no...

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With Ubuntu 12.04 as host and guest I followed wfudge answer.

This requires other packages to be installed:

sudo apt-get xserver-xorg-core

After that, executed this modified line from wfudge hinted by apt-get:

sudo apt-get install virtualbox-ose-guest-utils virtualbox-ose-guest-x11 virtualbox-ose-guest-dkms virtualbox-guest-x11

After that Ubuntu guest didn't boot into GUI, so with Ctrl+Alt+F1, logged in a console and executed:

sudo apt-get install ubuntu-desktop

Reboot and done. Now I can get higher resolutions up to 1600x1200. Still not 1920x1080 (host), so it's not full screen, but at least is much better than what I had before.

I guess is a VirtualBox problem, but when used a Windows host didn't have this...

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The window size is controlled by the VM's screen resolution. 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.

Change the screen's resolution in the VM's configuration, either via the GUI, or directly via the command line with xrandr.

First run xrandr with no arguments, it'll display all outputs (in this case they're just the virtual outputs emulated by VirtualBox).

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm ...

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.

Example : xrandr --output VGA1...

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After having first tried installing the Guest additions, which didn't work, I found another solution elsewhere: linuxbsdos.com.

Use Xdiagnose from the Dashboard. Search for and launch Xdiagnose, then enable all the options under the Debug section. Click the Apply button, then close the window and restart the system.

That's what finally did the trick! Now I get 1024 x 768 resolution instead of 640 x 480.

I never uninstalled the Guest additions, so it might be I needed to take both these measures.

---------- EDIT ---------

I have come to realize that the solution described above is just a fallback, in case installing the Guest Additions failed for some reason. I have finally managed to successfully install them, and can now choose from a bigger range of resolutions in the display settings. Here is how I did it, after having tried all of the above.

One thing I had already tried earlier was

sudo apt-get install virtualbox-guest-dkms...
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You say that you can't resize. Do you actually mean that you


resize, but you can't go larger than 1280x1024?

If yes, then I had that problem with VirtualBox 4.3.12, so really this is not a VBox version issue.

Though you have not said so, I'm going to guess that your host PC has a widescreen monitor. It would be nice to know its display size. I'm guessing that 1024 is close to the full height of your display.

The problem is that your Windows guests think that the virtual monitor is 4:3, so they are helpfully disallowing any display modes that use a widescreen ratio. This constraint is now stored in the windows registry somewhere, so you need to go through a few hoops to get around it.

First, make sure you are not in fullscreen mode: i.e. switch to your windowed 1280x1024 mode (or whatever windowed mode suits you). IMPORTANT. Make sure that View|Auto resize guest display is enabled (checked). Make sure that the Guest Additions are installed, not...
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Whereas Chapter 1, First steps gave you a quick introduction to VirtualBox and how to get your first virtual machine running, the following chapter describes in detail how to configure virtual machines.

You have considerable latitude in deciding what virtual hardware will be provided to the guest. The virtual hardware can be used for communicating with the host system or with other guests. For instance, if you provide VirtualBox with the image of a CD-ROM in an ISO file, VirtualBox can present this image to a guest system as if it were a physical CD-ROM. Similarly, you can give a guest system access to the real network via its virtual network card, and, if you so choose, give the host system, other guests, or computers on the Internet access to the guest system.

Since VirtualBox is designed to provide a generic virtualization environment for x86 systems, it may run operating systems of any kind, even those not listed here. However, the focus is to...

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