Dual Monitors on Linux Mint Guest

Discussions about using Linux guests in VirtualBox.
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MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

Hey Guys,

I'm trying to setup dual monitors on my Linux Mint guest but something isn't right.

When I tell virtualbox to use 2 monitors, it displays them as it should but one screen is blank. When I go into the display settings within Linux Mint, it says the screens are being mirrored but I turn off that option and then click apply and everything just goes blank.

Can anyone suggest what I'm doing wrong?

Thanks,

Mike
mpack
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Joined: 4. Sep 2008, 17:09
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Mostly XP

Re: Dual Monitors on Linux Mint Guest

Post by mpack »

Moved to "Linux Guests", since your question does not concern your Windows Host.
Perryg
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Posts: 34369
Joined: 6. Sep 2008, 22:55
Primary OS: Linux other
VBox Version: OSE self-compiled
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Re: Dual Monitors on Linux Mint Guest

Post by Perryg »

Actually you are not alone. If you select to boot in software mode ( cinnamon 2D ) it works as it should. However if you try to use the accelerated mode ( cinnamon ) it does not work properly at all. I don't have Mate to test this on but cinnamon does not work with the VBox accelerated drivers and multi-monitors.

You should post a ticket at bugtracker and be sure to let them know that it has to do with 3D acceleration and post the guests log file as an attachment to the ticket.
MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Re: Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

Ubuntu works fine, I'm tempted to download MATE but cinnamon looks a lot better :(.

Where can I find the guest logs?
MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Re: Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

I found the issue. If I have 3d acceleration disabled it works fine, if I have it enabled, the second screen remains blank so it definitely seems to be a bug.
Perryg
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Posts: 34369
Joined: 6. Sep 2008, 22:55
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VBox Version: OSE self-compiled
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Re: Dual Monitors on Linux Mint Guest

Post by Perryg »

Pretty sure it is. You can find the log by right clicking the guest in the main manager and then clicking on show logs. From there you can save it to post as an attachment in the ticket.
MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Re: Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

Last edited by Perryg on 9. Nov 2013, 00:48, edited 1 time in total.
Reason: correct URL
Perryg
Site Moderator
Posts: 34369
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VBox Version: OSE self-compiled
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Re: Dual Monitors on Linux Mint Guest

Post by Perryg »

Don't forget to post the guests log file. They are strict about that.
MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Re: Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

Where do I find that? Is it inside the guest? Which log file?
Perryg
Site Moderator
Posts: 34369
Joined: 6. Sep 2008, 22:55
Primary OS: Linux other
VBox Version: OSE self-compiled
Guest OSses: *NIX

Re: Dual Monitors on Linux Mint Guest

Post by Perryg »

You can find the log by right clicking the guest in the main manager and then clicking on show logs. From there you can save it to post as an attachment in the ticket.
Here is a copy from my post above.
MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Re: Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

There are 4 of them, do they need all 4? VBox.log, 1, 2, VBox.log.3.
MikeP1990
Posts: 7
Joined: 8. Nov 2013, 16:48

Re: Dual Monitors on Linux Mint Guest

Post by MikeP1990 »

Nevermind, deleted them all and booted up the guest, one was generated.

I've attached it to the bug report.
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