It is working for me on Mountain Lion. But my sleep isn't working anymore.
I had everything working on ML GM by manually injecting a device properties string and using platform-id of 01620005. Chimera now uses a mobile platform-id of 01660009 on my system, maybe that's why sleep isn't working. Have to do some testing...
Update:
Yeah, when using a mobile chipset platform-id (all with 0166) system profiler correctly shows my monitor as external, but wake from sleep does not work (everything turns on again like fans, hard drives, but monitor does not power up). darkwake=0, patching AGPM or anything else does not help. However, when using a desktop chipset platform-id (only one is 01620005) wake from sleep does work, but my monitor is recognized as built-in in system profiler.
I think the monitor being recognized as built-in is also the reason why it is powering up.
But it could also be my motherboard ... is someone else able to wake up from sleep with HD4000 and Chimera 1.11?