Comment 9 for bug 813343

http://silverwav.wordpress.com/2011/09/01/upgrading-to-oneiric-11-10-beta-1-propritary-nvidia-drivers/

This was a little tricky.

I have a Nvidia GeForce 8600 GTS; 1 x Samsung SM226BW (left 1680x 1050); 1 x SMB2430H (right 1920x 1080.).

I was using TwinView via NVIDIA Settings in Natty 11.04 OK prior to the upgrade.

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Update : 02.09.2011

I find that to have TwinView work correctly across both screens I need to do this:

The NVIDIA Settings Screen Dance

Enable TwinView, apply and click OK on the invisible dialogue box.

Set Clone and Apply then Cancel.

Note: Both screens now are enabled (but both showing the same view).

Move the right screen to the left or vice versa and apply.

Note: Both screen now allow windows to be moved from one to another.

Move the right screen back to the left and apply.

All working correctly now :-)

Oh and you may want to have a look at this.

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Update : 08.09.2011

The latest update has fixed this issue, NVIDIA Settings with TwinView now works fine. :-)

Linux 3.0.0-10-generic #16-Ubuntu SMP Fri Sep 2 18:32:04 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

NVIDIA Driver Version:280.13 (nvidia-current)
Server Vendor Version:1.10.2.902 (11002902)