Seamless mode has issues on dual head hosts

[Maksim Melnikau]

I'm using 2 monitors, configured via xrandr --output VGA --below LVDS. When switching on seamless mode, vbox hides and I see black screen, (no any output), but I can press Home+L - and return to previous mode.

[Maksim Melnikau]

I make little bit more tests. Switching to seamless mode works if virtualbox on 1st display, and doesn't when on 2nd

[Michael Thayer]

Seamless mode currently does not work on the second monitor of a dual head setup. This is a known limitation.

[Michael Thayer]

Tickets #2607, #3815 and #3876 have been marked duplicates of this one.

[Michael Thayer]

Ticket #4566 has been marked a duplicate of this one.

[Stéphane Charette]

I checked the user manual, and it doesn't look like this limitation is explained anywhere. Would be nice if it was briefly mentioned that seamless is known not to work on 2nd monitor so people don't waste their time.

[Aaron Schnabel]

I just wanted to add that if this feature could be implemented, that would be absolutely killer. I use VBox daily at work and at home and having the ability to use two monitors in seamless mode would be absolute heaven.

Work - VBox 3.0.4 Windows XP pro host and Guest.

Home - VBox 3.0.4 Ubuntu host and XP pro Guest

[Michael Thayer]

Ticket #1185 has been marked a duplicate of this one.

[Michael Thayer]

stephanecharette: updated the user manual and the FAQ. Thanks for pointing this out.

[Michael]

Is there any plan to implement seamless mode support for multi-head setups?

[darkjavi]

I'm also affected by this bug. seamless only works on primary monitor,and fullscreen works on both but only 1 at time. Is this getting any attention?

[danzir]

I just registered to repeat what others are saying. We need this feature. VMWare player already added it in their v3. I have a Windows XP host, Ubuntu 9.10 guest and I cannot drag linux windows to my second monitor.

[metaljunk]

And I just registered to tell you this was absolutely not necessary.

Thanks. Maybe you'll learn.

[chinto]

Same issue on Mac OS X with Windows 7 as Guest. Seamless mode only works on primary monitor.

[myak]

For anyone encountering this bug, here's a workaround, worked for me on Linux host with Windows Server 2012, but I'm pretty sure it would work for other Windows guests, a different OS maybe too:

1. Go to Settings -> Display, change the Monitor Count to 2
2. Boot the Windows guest, log in to desktop, right click and select Screen resolution
3. If Windows doesn't see your second virtual display, click on Detect button
4. At this point, a new VirtualBox screen window will appear, move that to your second physical display, maximize both windows
5. Enter seamless mode!

Here's the end result: ​http://imgur.com/z2Q4AYu If your physical displays are not the same resolution, like in my case, you will most likely need to adjust positioning in Windows screen setup to make sure both are aligned correctly (I haven't done that yet on the screenshot). Also the Windows taskbar remains visible at the bottom of the primary display, I just turned on the auto hide feature and I'm good.