some more information how to get Intel and ATI working together.
[HOWTO] Using recent muxless Intel/ATI hybrid graphics
http://forums.gentoo.org/viewtopic-t-909802.html
I tried the ATI proprietary driver few months back but the latest version was showing some messages about the Powerxpress not being supported on ATI/Intel hybrids.
I am monitoring the linux pci mailing lists and there have been few patches floating around that sound like possible fixes to an issue I think the graphic card has where the PCI bus number the OS thinks it's on (16:00) is not what the PCI address the video drivers find the devices on (22:00).
Maybe the newer ATI driver has better support but I haven't had the time to test it out.
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