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Old 11-16-06, 04:51 AM   #13
JaXXoN
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Default Re: nvidia staff PLEASE definitively answer triple head/dual card questions

Hi!

In your case, i would recommend defining three separate screens
and then apply Xinerama. This will create a desktop spanning
all three displays and provide correct Xinerama information to the
clients.

However, in earlier times, this solution had a notible performance
issue, i.e. when dragging a window from the first display to
the second one - twinview has been much faster. The situation
got much better with the 9xxx series driver: there is still a small
performance difference between twinview and xinerama with a
multiscreen setup, but it should now be ok for most users :-)

Please find attached a number of sample multihead configuration files.
The configuration you might be interressted in is
xorg.conf-4800x1200_triplehead-3x1-xinerama-dualview+monoview

regards

Bernhard
Attached Files
File Type: zip xorg.conf-multihead-examples.zip (20.3 KB, 481 views)
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Old 11-16-06, 11:44 AM   #14
majoridiot
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Default Re: nvidia staff PLEASE definitively answer triple head/dual card questions

thanks, jaxxon. i am hearing more and more that the performance issues with x xinerama aren't as bad as they were previously. i'll play around with your suggestion of individual screens once i see how stable the 9xxx driver is.
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Old 06-25-07, 06:39 PM   #15
pest_789
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Default Re: nvidia staff PLEASE definitively answer triple head/dual card questions

Now that its been six months or so, what's the current status? Is there a light at the end of the tunnel?

I REALLY want a fully accelerated three-monitor Compiz/Beryl/whatever accelerated desktop
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Old 06-26-07, 12:21 PM   #16
JaXXoN
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Default Re: nvidia staff PLEASE definitively answer triple head/dual card questions

Quote:
Originally Posted by pest_789
Now that its been six months or so, what's the current status? Is there a light at the end of the tunnel?

I REALLY want a fully accelerated three-monitor Compiz/Beryl/whatever accelerated desktop
There does exist an interim solution for the "XineramaInfo problem"
with twinview setups, but it seems that it is currently not possible to
have Beryl working with Xinerama. For details, please check

http://www.nvnews.net/vbulletin/showthread.php?t=85604

regards

Bernhard
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Old 06-26-07, 02:24 PM   #17
pest_789
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Default Re: nvidia staff PLEASE definitively answer triple head/dual card questions

Cool! I'll have to give it a try.
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Old 09-07-08, 06:46 AM   #18
phillipo
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Default Re: nvidia staff PLEASE definitively answer triple head/dual card questions

Hi there,

I know I'm bumping a pretty old thread here, but I'm having exactly the same issue as the original poster described, so it made sense.

However, the difference for me is that I do not want Xinerama on the third monitor. I'm going to be getting a fourth LCD soon, and have decided that sharing windows only between TwinView pairs will surfice in order to have compiz. So, right now, I've got 3 LCD's, two in a TwinView pair, one as a separate X screen.

Certain programs (like avant-window-navigator, or xfce4 panels), appear in the middle of, or span, the TwinView pair. However, running compiz on this configuration allows windows to maximise to each monitor rather than to maximise and span the TwinView.

Basically, longterm I want two TwinView pairs, short term I want 1 TwinView pair and 1 separate X screen. Additionally, my LCD resolutions are not identical.


I've seen some info indicating that this /may/ be a bug in the underlying gnome libraries, but I'm not entirely sure.

Any idea why this may be occuring?

Cheers,
Phillip
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