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I'm not able to switch to Seamless Mode in VirtualBox with Ubuntu 10.04 or 9.10 as guest OS's. I have tried the seamless mode with XP as guest OS, and it works absolutely fine. The host OS is Windows 7.

I have in-built Via/S3G Unichrome Pro IGP graphics, and I have allocated 30 MB out of 64 MB of graphics memory. I've also 1.5 GB of RAM.

I also tried installing Guest Additions but it still didn't work. VirtualBox version is 4.0.4r70112. The Host+L does not lead to seamless mode. i.e. under the Machine menu in Virtual box window "Seamless mode" is disabled (comes in grey color). How can I get the seamless mode to work? Please help!

jsbisht
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9 Answers9

9

For seamless mode (Host+L) Virtual Box Guest Additions of the same program version need to be installed in the guest OS.

How to install Guest Additions see also this answer. In some cases you will simply need to reinstall the Guest Additions if they don't run the way they should.

Community
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Takkat
  • 144,580
6

Turn off Nested Paging in the System tab and restart the guest.

Mark
  • 61
1

May be you forgot installing the guest additions in the GUEST. For doing so, click in the menu "Devices" in the GUEST window, and choose "install guest additions"

Bernardo Mello
  • 19
0

Even after installing guest additions, Seamless Mode was still disabled for me. But, when I switched to Scalled Mode(Host+C), Seamless Mode become enabled. When I used Host+L, GuestOS screen went full screen, meaning it worked.

So, whenever Seamless Mode is disabled or grayed, even after installing the guest additions, check if Scalled Mode is turned on.

Other things that I have ensured:

  1. Settings -> Display -> Screen
    1. Graphics Controller -> VBoxSVGA
    2. Acceleration -> Enabled.
  2. Settings -> System -> Acceleration
    1. Paravirtualization Interface -> Hyper-V
    2. Hardware Virtualization -> Enable Nested Paging

I hope this helps someone.

Note: I am using MacBook.

explorer
  • 111
-1

I had the same exact problem, until I started VirtualBox as root and launched the virtual machine from there:

sudo virtualbox

It ended up locking my virtual machine files to root read/write only, but it's absolutely worth it to get this working. To get you started, here's my desktop file to my virtual machine called 'Win10':

[Desktop Entry]
Encoding=UTF-8
Version=1.0
Name=Win10
Comment=Starts the VirtualBox machine Win10
Type=Application
Terminal=true
Exec=sudo /usr/lib/virtualbox/VirtualBoxVM --comment "Win10" --startvm "Win10"
Icon=virtualbox-vbox.png

Replace 'Win10' with the name of your virtual machine, hopefully this works for you.

Matthew Wendel
  • 1
-1

Install Guest Addtions from Synaptic.

Oxwivi
  • 18,499
-1

Try by clicking and holding Host key (by default, it's Right Ctrl) and then pressing the L key.

Eliah Kagan
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Milson
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-1

I'm running windows8.1 guest on ubuntu host and seamlesss mode don't get enabled until user session is started in windows, maybe a few seconds after login.

Esteve
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-1

I am using an Ubuntu host with a Windows 7 guest. I had the same problem, until I went into the 'Computer' folder on the guest system. If you have loaded the guest additions disc image, it should appear in the CD drive of the guest system. Manually open it, and look for the VBoxWindosAdditions application. Open this and follow the set-up instructions.

Jens Erat
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Ubuntusplash
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