I think it changed it till the Blue light turned on "S2"

I have this flash, and use it on my G1 and GH2. I haven't been able to trigger TTL mode in Panasonic cameras, and I was told somewhere on this forum that there is no TTL support for panasonic G cameras. Anyway, I checked the G1 menu and it isn't there.

So this flash for Panny cameras is fully useful only in Manual and S1 and S2 modes. I use it with all my strobes in a small studio set-up, so this flash is like a trigger for those strobes. I only wish this flash can fire a signal and no flash at all, so I can trigger the strobes wirelessly without introducing more light from the flash.

Eventually though, I got a used D90 and a speed light. I am heavily invested in M43 and have no plans to leave the system. But on this one matter of lighting, I think it lags behind Canikon in range, accessories, and cost (aka, 3rd party solutions).

Strangely enough, it's working like a charm on my GF1. In P mode camera chooses somewhat slow shutter (like 1/30) but this definitely confirms that flash is in TTL mode

Are you sure you've got specific 4/3 model?

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E-M5 OM-D E-PL1 G3 45/1.8 14/2.5 25/1.4 9-18 14-150 12-50 VF2 Di466 YN460 MCON-P01

awesome, changed mine to M mode. Now I have a sweet wireless flash setup, thanks!