You should get a popup on your screen. Follow the screen instructions to finish the installation. After that, you need to add the second monitor to your virtual machine. For that, open the VirtualBox > select the virtual machine > click the Settings button.Then, go to the Display section and make sure you are in the Screen tab. From here, you need to assign the maximum video memory to your virtual machine. For that, use the Video Memory bar to provide the maximum available video memory. Secondly, select two (2) in the Monitor Count box.These two settings are mandatory. However, if you want better performance, you can select the Enable 3D Acceleration checkbox. After making all the changes, click the OK button to save.Now start your virtual machine and press Host + F buttons together. By default, the right Ctrl is the Host button. After that, you have to assign a virtual screen to a host screen. For that, go to View > Virtual Screen 1 > Use Host Screen 1.Similarly, go to View > Virtual Screen 2 > Use Host Screen 2. Now you can find the virtual machine on both monitors. Also, if you want, you can use Host Screen 2 for Virtual Screen 1 as well.I hope this simple solution will be helpful for you.Read next: How to use dual monitor with VMware virtual machine.
Settings -> Display -> Monitor count -> Change to two (This is with the machine powered off running Windows 10).Then, once I had started the machine I went to View -> Virtual Screen 2 -> Enable
How to use Dual Monitor with VirtualBox virtual machine
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Multiple monitors work only with the VBoxHeadless frontend. You mustalso enable VRDP multiconnection mode (see chapter 7.4.6, VRDP multipleconnections, page 94) to access two or more VM displays when theguest is using multiple monitors.
I am running Windows 7 host, Ubuntu guest inside of Virtualbox. I have installed guest additions, but when I go to display settings it stills says Unknown Display and doesn't let me add another monitor (added another monitor to this VM in virtualbox following instructions I found online). How do I get this to work? Have tried reinstalling guest additions but no success so far.
Video Memory: Sets the size of the memory provided by the virtual graphics card available to the guest, in MB. As with the main memory, the specified amount will be allocated from the host's resident memory. Based on the amount of video memory, higher resolutions and color depths may be available.
The GUI will show a warning if the amount of video memory is too small to be able to switch the VM into full screen mode. The minimum value depends on the number of virtual monitors, the screen resolution and the color depth of the host display as well as on the use of 3D acceleration and 2D video acceleration. A rough estimate is (color depth / 8) x vertical pixels x horizontal pixels x number of screens = number of bytes. Extra memory may be required if display acceleration is used.
Monitor Count: With this setting, Oracle VM VirtualBox can provide more than one virtual monitor to a virtual machine. If a guest OS supports multiple attached monitors, Oracle VM VirtualBox can pretend that multiple virtual monitors are present. Up to eight such virtual monitors are supported.
The output of the multiple monitors are displayed on the host in multiple VM windows which are running side by side. However, in full screen and seamless mode, they use the available physical monitors attached to the host. As a result, for full screen and seamless modes to work with multiple monitors, you will need at least as many physical monitors as you have virtual monitors configured, or Oracle VM VirtualBox will report an error.
Scale Factor: Enables scaling of the display size. For multiple monitor displays, you can set the scale factor for individual monitors, or globally for all of the monitors. Use the slider to select a scaling factor up to 200%.
On the Remote Display tab, if the VirtualBox Remote Display Extension (VRDE) is installed, you can enable the VRDP server that is built into Oracle VM VirtualBox. This enables you to connect to the console of the virtual machine remotely with any standard RDP viewer, such as mstsc.exe that comes with Microsoft Windows. On Linux and Oracle Solaris systems you can use the standard open source rdesktop program. These features are described in Remote Display (VRDP Support).
On the Recording tab you can enable video and audio recording for a virtual machine and change related settings. Note that these features can be enabled and disabled while a VM is running.
I have a PC with Windows installed on it. I also installed Virtual Box that opens a virtual machine with Xubuntu OS.I want to be able to use two screens also on the virtual machine. I also configured VirtualBox to have 2 screens.
A user running VirtualBox 5.1 on a host machine with two displays connected may find that they periodically cannot display the guest VM on the non-primary display. This behavior was originally reported in the following environment, but may be seen in subsequent builds:
In this scenario, the user will find that the guest Virtual Machine (VM) may display sporadically on a second display. If the user then sets the second display as the "primary display", then both monitors will show the desktop and the guest VM will work as expected in dual monitor operation until the guest VM is again rebooted, which may cause the behavior to reappear.
I had a similar problem for which I wish to share a solution.I have only 1 monitor (max 2560x1440) but I could only get max 1920x1200. Going Full screen (Right-Cntrl F) or dragging window edges only showed me 1920x1200 with a black border.I changed Graphics Controller from VboxVGA (will be removed in future according to =1&t=93941) to VMSVGA (recommended for Linux Guests) and rebooted.Everything was the same until I used Windows 10 host Maximize button which enabled proper full screen (2560x1360) and I can now drag window edges to get any resolution, not just std resolutions.My system isHost: Windows 10VirtualBox: 6.1.4Guest Additions: 6.1.5 (due to copy/paste problem with GA 6.1.4)Client: Ubuntu 18.04.
You have considerable latitude when deciding what virtual hardware to provide to the guest. Use virtual hardware to communicate with the host system or with other guests. For example, you can use virtual hardware in the following ways:
Oracle VM VirtualBox is the first product to provide the modern PC architecture expected by OS X without requiring any of the modifications used by competing virtualization solutions. For example, some competing solutions perform modifications to the Mac OS X install DVDs, such as a different boot loader and replaced files.
The emulated USB controllers do not communicate directly with devices on the host. Instead they communicate with a virtual USB layer which abstracts the USB protocol and enables the use of remote USB devices.
In the Settings window, under General, you can configure the most fundamental aspects of the virtual machine such as memory and essential hardware. The following tabs are available.
For security reasons, the shared clipboard is disabled by default. This setting can be changed at any time using the Shared Clipboard menu item in the Devices menu of the virtual machine.
On the Description tab you can enter a description for your virtual machine. This has no effect on the functionality of the machine, but you may find this space useful to note down things such as the configuration of a virtual machine and the software that has been installed into it.
Chipset: You can select which chipset will be presented to the virtual machine. PIIX3 is the default chipset for most guests. For some guest OSes such as Mac OS X, the PIIX3 chipset is not well supported. As a result, Oracle VM VirtualBox supports an emulation of the ICH9 chipset, which supports PCI express, three PCI buses, PCI-to-PCI bridges and Message Signaled Interrupts (MSI). This enables modern OSes to address more PCI devices and no longer requires IRQ sharing. Using the ICH9 chipset it is also possible to configure up to 36 network cards, compared to a maximum of eight network adapters with PIIX3. Note that ICH9 support is experimental and not recommended for guest OSes which do not require it.
Pointing Device: The default virtual pointing device for some guest OSes is the traditional PS/2 mouse. If set to USB Tablet, Oracle VM VirtualBox reports to the virtual machine that a USB tablet device is present and communicates mouse events to the virtual machine through this device. Another setting is USB Multi-Touch Tablet, which is suitable for guests running Windows 8 or later.
However, software support for I/O APICs has been unreliable with some OSes other than Windows. Also, the use of an I/O APIC slightly increases the overhead of virtualization and therefore slows down the guest OS a little.
Processor(s): Sets the number of virtual CPU cores the guest OSes can see. Oracle VM VirtualBox supports symmetrical multiprocessing (SMP) and can present up to 32 virtual CPU cores to each virtual machine.
PAE stands for Physical Address Extension. Normally, if enabled and supported by the OS, then even a 32-bit x86 CPU can access more than 4 GB of RAM. This is made possible by adding another 4 bits to memory addresses, so that with 36 bits, up to 64 GB can be addressed. Some OSes, such as Ubuntu Server, require PAE support from the CPU and cannot be run in a virtual machine without it.
In most cases, the default settings on the Acceleration tab will work well. Oracle VM VirtualBox selects sensible defaults, depending on the OS that you selected when you created the virtual machine. In certain situations, however, you may want to change the preconfigured defaults. 2ff7e9595c
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