I am unable to output to this screen (which works well with the latest Raspbian-Wheezy release). I made all updates/upgrades, a firmware update (sudo wget://www.itontec.com /mz61581-overlay.dtb) after having removed the old file in /boot/overlays/, made the changes to the 99-fbturbo.conf in xorg-conf.d (fddev /dev/fb1), in short everything that worked with Raspbian-Wheezy.
Nothing helps, the TFT remains black and Retropie + ES boot into HDMI.
The Raspberry is model Pi2.
There are no differences regarding retropie and raspbian wheezy in terms of this apart from overscan_scale=1 being set by retropie in /boot/config.txt and retropie image having a splashscreen on boot (which can be disabled)
you can install retropie on top of raspbian, so perhaps start with a working raspbian image and go from there ?
1. there is no problem with the latest firmware
2. I installed retropie (without problems) on top a running Raspbian-Wheezy (which works well with the TFT); leaving the X Desktop, stopping the lightdm service; execution “emulationstation” brings up ES on the HDMI, even if the 99-fbturbo.conf was correctly configured for fbdev /dev/fb1″