Single GPU multiple display performance mode

[John Ivar Haugland]

Hi,

I have one GPU and two screens configured independentlay from each other
(Dual view). Nvidia driver 181.20. In "Manage 3D settings" under
"Multi-display/mixed-GPU acceleration" I have tried both
1: "Single GPU multiple display performance mode" and 2: "Multiple display
performance mode" in combination with the command: osgviewer cow.osg. (SVN
version of OpenSceneGraph)

For both modes I get two windows, however, for the first mode the cow does
not appear on the second screen. When the second window is moved to the
first screen, the cow appears, and disappear when moved to the second screen
again. Is this behavior as intended ?

The second mode "Multiple display performance mode" works fine.

John Ivar.

[Jean-Sébastien Guay]

Hi John,

Post by John Ivar Haugland
For both modes I get two windows, however, for the first mode the cow
does not appear on the second screen. When the second window is moved to
the first screen, the cow appears, and disappear when moved to
the second screen again. Is this behavior as intended ?

Since the setting is called "Single Display Performance Mode", I think
it's intended, and dictated by the driver. I don't think OSG has
anything to do with the behavior you're seeing.

Post by John Ivar Haugland
The second mode "Multiple display performance mode" works fine.

Which is why it's the default setting. I think the settings are named
appropriately, don't you?

J-S

[Kawicki, Ryan H]

J-S, I think you might have mistaken the "Single GPU" with "Single Display."

In any case, I do remember this feature working prior to 181.20. This seems to be a driver related bug, as I too am having the same problem. I'm sure NVidia already knows of the problem, but it wouldn't hurt to send them a problem report.

Ryan H. Kawicki
The Boeing Company
Training Systems & Services
Software Engineer

-----Original Message-----
From: Jean-Sébastien Guay [mailto:jean-sebastien.guay-***@public.gmane.org]
Sent: Monday, January 26, 2009 8:49 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Single GPU multiple display performance mode

Hi John,

Post by John Ivar Haugland
For both modes I get two windows, however, for the first mode the cow
does not appear on the second screen. When the second window is moved
to the first screen, the cow appears, and disappear when moved to the
second screen again. Is this behavior as intended ?

Since the setting is called "Single Display Performance Mode", I think it's intended, and dictated by the driver. I don't think OSG has anything to do with the behavior you're seeing.

Post by John Ivar Haugland
The second mode "Multiple display performance mode" works fine.

Which is why it's the default setting. I think the settings are named appropriately, don't you?

J-S
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[Jean-Sébastien Guay]

Hi Ryan,

Post by Kawicki, Ryan H
J-S, I think you might have mistaken the "Single GPU" with "Single Display."

Hey, you're right, I misread that! *embarrased*

Sorry about that. I don't know why you're getting trouble on your other
screen then. Sorry for jumping the gun.

J-S