On 09/14/2009 09:31 AM, Tippett, Matthew wrote:
Hi. I'll talk about the generic RANDR and Xinerama situation. I'll
leave other domain experts fill in any NV specifics.
RANDR currently allows both static and dynamic configuration of
position and rotation for 'individual' head mode. This doesn't matter
how many GPUs or heads you have. You don't have the 'unified desktop'
experience and can't move the windows between heads. If you have a
randr capable setup and only one head (multiple outputs) per GPU, you
can have a '2+1' config.
For Xinerama mode, you can statically configure randr modes through
xorg.conf. The randr extension is turned off when xinerama is enabled.
So it really depends what you want to do. If your intent is to use one
screen with near static (and immovable content) like a mailer or
something similar, the non-xinerama mode may do what you need.
Although there has historically been talk of deprecating Xinerama, it
is currently the only way to configure multiple cards into a single
desktop. If you checkout the recent phoronix articles, you can see
that 24 displays are possible. (The video is 4 head with static randr
without xinerama, but the same as a single head with static randr
xinerama can achieve the same thing).
Regards... Matthew
That actually helps greatly, it's pretty much what I've been figuring
out through trial and error - but it helps to hear it outright. I've
noticed there seems to be no word on when Xinerama will be deprecated
and what will replace that functionality.
I guess it's something I'll have to keep an eye on...
Thanks again
Daniel
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