Xorg Composite Extension Slow with nVidia Twinview
I have a Dell Inspiron 8200 with GeForce4Go 64MB graphics. Running 1400x1050 resolution on Xorg 6.8.1. In this configuration I get excellent performance with the X Composite Extension Enabled and running:
xcompmgr -f -c
However, when I enable TwinView in my xorg.conf file the performance suddenly becomes terrible (almost unusable). With TwinView enabled, my second monitor is only running 1024x768, so I don't see why there should be such a huge performance hit.
I am using the standard AGPGART with AGP running in 4X mode. (I am using a standard Fedora Core 3 kernel so it has AGPGART statically compiled in and I can't use the nvAGP module).
I also have the following options set:
Option "TwinViewOrientation" "leftOf"
Option "SecondMonitorHorizSync" "31.5 - 90"
Option "SecondMonitorVertRefresh" "50.0-75.0"
Option "MetaModes" "1024x768,1400x1050"
Option "NvAgp" "2"
Option "RenderAccel" "true"
Option "AllowGLXWithComposite" "true"
Also the only extension is:
Option "Composite" "Enable"
Does anyone else have the same problem? I use my laptop with the second screen most of the time so I'd appreciate any suggestions anyone might have.