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VMSVGA dual monitors not working

PostPosted: 3. Dec 2018, 02:45
by Zendril
I have a Win10 Host, Ubuntu 18.04 Guest.
Running on a MatebookX Pro 16GB Ram, Nvidia GPU.

I can get dual monitors working great with vboxvga.
With VMSVGA I cannot.

Some observations
- The 'enable' button is greyed out for the 2nd monitor in 'View'
- I have given it 2 monitors in the Settings, Display. 128MB video memory.
- The performance on VMSVGA is much snappier (perhaps because it is driving only a single monitor?)
- I do have guest additions installed. In Ubuntu guest under Additional Drivers
- Guest utilities it says the device is not working. (It is working when using vboxsvga)

Note: It is a VM that was created on the latest 5.x.

Any suggestions?

Re: VMSVGA dual monitors not working

PostPosted: 3. Dec 2018, 08:26
by socratis
Even if I start with 2 monitors with VBoxVGA, when switching to VMSVGA the display preferences shows 1, unknown monitor. Host OSX 10.11.6, Guest Ubuntu 16.04.

Zendril wrote: - The performance on VMSVGA is much snappier (perhaps because it is driving only a single monitor?)
Snappier? It sucks big time over here, as big as they come. CPU on the host and in the guest shoots up, due to 'compiz' freaking out. It happens even with 1 monitor. Moving a window is like trying to drag a mule through the mud. Close to unacceptable. I have never seen anything that slow before.

Re: VMSVGA dual monitors not working

PostPosted: 23. Apr 2019, 10:23
by davide.cavestro
socratis wrote:Even if I start with 2 monitors with VBoxVGA, when switching to VMSVGA the display preferences shows 1, unknown monitor.

I have the same problem even on VirtualBox 6.0.6, Debian Buster guest, Windows 10 as host.
@socratis any idea if it is a known issue (did you file a bug for it)?

Re: VMSVGA dual monitors not working

PostPosted: 23. Apr 2019, 10:54
by mpack
v6.0.6 is not a release candidate or a beta. Please discuss it here: Discuss the 6.0.6 release.