Hi Joe and list members:

Probably speaking in ignorance, but putting aside 
multiseat-VS-singleseat(1kbd/1mouse)
and the specifics related to xorg.conf particulars (including different
layouts and options), I'd concur w/others here; i found the best success with 
nVidia devices
 ( using the proprietary nvidia driver and not nv).

Downloading and installing the drivers, kernmods etc.. is a breeze, there's 
no lack of SERP related to issues and most/many of them are solved.
Just take care that 'nvidia-setup' doesnt mung up your hand-crafted xorg.conf

For just 2 Screens, the process is simple enough:  Extended (not twinview) and 
Dual
layouts are easy enough for most all cases. But there are some exceptions. What 
kind
of outputs do you want on your card? pure DVI/VGA ,HDMI , TV-out? I assume you 
intend 2xVGA, but
different ports add complexity.

Below is a dir listing of what i'm currently working on. I'm now dealing with 
DM's (all bad), WM sessions,
getting XDMCP working, console(tty?.conf) launchers and all the myriad ways to 
start X including Xephyr|Xnest|

But i have my video working right and all the xorg.conf layouts and exec calls 
working right. So
if you see anything that catches your eye, I'll send it your way.

 tuxiboadmin[pts/1] cwd: ~/tmp/Xorg  
 cmd:ls
Configure.notes          junk.txt                                               
X11Vnc.help
detectInput.py           Multiseat                                              
XDMCP
download                 NX-stuff.rion                                          
xephyr-precompiled.tar.bz2
dualhead-g450.html       rion-xorg-configure-log.txt                            
xf-video-udlfb.git.tgz
DualMon.setup.xbmc.html  Slash_Multiple-Desktop-Users-on-a-Single-Machine.html  
xkbcfg.git.tgz
DualMon.setup.xbmc.txt   Slash_Multiple-Desktop-Users-on-a-Single-Machine.txt   
xorg.twinview.info
Jori                     Tuts                                                   
Xserver.man
junk                     TVout-Svid.info
JUNK                     Usplash.info

 tuxiboadmin[pts/1] cwd: ~/tmp/Xorg  
 cmd:ls Multiseat/
14-Multiseat-X-Under-X11R6.97.0.html        Multiseat.e3t
14-Multiseat-X-Under-X11R6.97.0.html2       multiseat-lucasnascfereira.html
15-Multiseat-Issues-with-Nvidia-Cards.html  multiseat-lucid-tut.html
build                                       MultiseatOneCard
CHANGELOG                                   
multiseat-part-1-setting-up-base.html
files                                       multiseat-tut.html
module-setup.py                             multiseat-tut.txt
multiseat                                   MultiseatX.ubuntu-community.html
multiseat-computer-with-ubuntu-804.html     MultiseatX.ubuntu-community.txt
multiseat-computer-with-ubuntu.html         README
Multiseat-config-script                     readme.rion
Multiseat.e3p                               setup.sh

 cmd:ls Multiseat/multiseat
configurator.py  constants.py  __init__.py  output.py  seat.py  test  utils.py

My 'personal', 1st-hand experience with ATI is limited, but
simple grepping thru those files shows this:
grep -i radeon *
Multiseat/14-Multiseat-X-Under-X11R6.97.0.html: 
this starts my radeon video card (havithis starts my radeon video card (having 
some artefacts like black short lines in top of the screen
And 3dfx starts for a 40 seconds (time when second x server starts) And halts 
after 2-nd X server starts
RION:NOTE: below may be very apropos (or not), but was for me (it took me a 
week of searching to find "-isolateDevice"):
 a server with Radeon 9200 video card and it's bus pci is 1:0:0 - So paramiter 
-isolateDevice used to isolate the device of the current server
SEE 
http://blog.chris.tylers.info/index.php?/archives/14-Multiseat-X-Under-X11R6.97.0.html

Multiseat/multiseat-computer-with-ubuntu-804.html:
http://netpatia.blogspot.com/2008/02/multiseat-computer-with-ubuntu-804.html
The video card is a Radeon X300 PCIe by ATI with two outputs (VGA and DVI). On 
the DVI output we have a DVI to VGA converter so we can connect two simple VGA 
monitors.



I could go on pasteing a flood of notes and comments, but you get the drift.
perhaps below could be helpful:

https://help.ubuntu.com/community/MultiseatOneCard 

Anyway, hope this helps

Rion

On Monday 27 June 2011, joe golden wrote:
> Hey Folks,
> https://help.ubuntu.com/community/MultiseatOneCard

> sorry I missed libations at the Farmhouse.
> 
> What's the best graphics card for simple solid 2d graphics w/ two 
> monitors. I'll be browsing the web and editing, not playing 3d shooter 
> games. Looking for open source drivers and compatibility w/ RandR/etc. 
> rather than proprietary drivers.
> 
> Thanx.



-- 
Best of luck, I hope you don't need it
And remember you are unique...just like everyone else.

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