No resolution options, but graphics card seems to load ok?

[fowie]

Intel GMA 950 mobile with VGA and HDMI out. Using HDMI out I get no resolution options, just default 1024x768. I'm using the AppleIntelGMA950.kext from iAtkos v7. In the windowserver.log I get:

Nov 03 21:39:04  [62] Server is starting up
Nov 03 21:39:07  [62] CGXMappedDisplayStart: Unit 0: no display alias property
Nov 03 21:39:07  [62] CGXPerformInitialDisplayConfiguration
Nov 03 21:39:07  [62]   Display 0x5b81c5c0: MappedDisplay Unit 0; Vendor 0x756e6b6e Model 0x717 S/N 0; online enabled (0,0)[1024 x 768], base addr 0x21c5000
Nov 03 21:39:07  [62] AGCAttach: Couldn't find any matches
Nov 03 21:39:15  [62] kCGErrorIllegalArgument: CGXSetWindowListTags: Operation on a window 0x6 not owned by caller SystemUIServer
Nov 03 21:39:15  [62] kCGErrorIllegalArgument: Set a breakpoint at CGErrorBreakpoint() to catch errors as they are returned

How can I get more resolutions? The screen should be doing 1280x1028x32@60