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Does VMSVGA support multiple monitors?

PostPosted: 25. Jun 2019, 12:22
by Chewi
I've been using CentOS 7 under Windows 10 for a while. I just updated to VBox 6 and was hoping to get better graphical performance. VMSVGA looked as though it might be better overall but I can only get it to bring up one monitor. I can see from /sys/class/drm that it lists further monitors such as card0-Virtual-2 but these are all marked as disabled and I can't find any way to enable them. With VBoxVGA and VBoxSVGA, this just works. I can't find any information about this anywhere. VMSVGA is relatively new so I guess few people have tried it.

Re: Does VMSVGA support multiple monitors?

PostPosted: 27. Jun 2019, 00:01
by socratis
I tried it with a Mint19 VM, no problems. 2nd monitor was detected instantly, and could be as easily configured.

With a Fedora29, I couldn't get it to see the monitor. I spent an hour trying to look for a way to enable it, no dice, I gave up. If they want to get to desktop users, they better start working on some usability issues, like Mint is doing...

Re: Does VMSVGA support multiple monitors?

PostPosted: 27. Jun 2019, 00:15
by Chewi
Interesting, thanks. Strange though as Fedora 29 is slightly newer than Mint 19. The common element here is Red Hat although I think Fedora stays fairly close to the mainline kernel.

Re: Does VMSVGA support multiple monitors?

PostPosted: 27. Jun 2019, 00:21
by socratis
I don't think it's a newer vs. older release. I think it's more about usability and Plug'n'Play issues. Some distros make some really weird decisions of what should or shouldn't be.

In Kali/Debian for example, you'll have to do some digging and config file editing, if you want to have more than one NIC at a time. Enable NIC #3, NICs #1, #2 and #4 are off. Enable NIC #1, all the others go dead. Go figure...