Thanks for helping me with the Project. I have found  a solution by my own. Because of the very confusing configuration data in recalbox, I have deleted recalbox and put RetroPie instead. It worked like a charme on first run

How can I change the resolution to 800x480 in recalbox.conf? I know where but I don´t know which video mode i got to use (CEA 4 etc.) Tvservice always says: "invalid group". Can someone tell me the videocode für that resolution?   Please help me !!

http://www.ebay.de/itm/371404551530?euid=85e6c987a3e349889eb56a0e1d848015&cp=1   This is the screen. I dont care much about the touchpad. But i need the size. Thanks for the advices. I´ll give it a try.   Edit: It is a HDMI display. Shall I turn overscan off?   Edit 2: With that config.txt , i made it to run the boot sequence in correct display format. SelectOS menu is also normal but when the RecallBox logo appears, there is a broken format again.   Edit 3: I changed the resolution for emulationstations to default but same issue

It doesent work at emulator station. I dont tested it ingame yet. Do you have a solution? Thanks

Hey folk! I don´t  get fullscreen on RecalOS because i don´t know where to change the resolution and so on. It was already a hard fight to get that display working on Raspian. I do not know, where to change the resolution in recalbox.conf Here are the Codes in Config.Txt which made it work: "# uncomment to force a specific HDMI mode (here we are forcing 800x480!) hdmi_group=2 hdmi_mode=1 hdmi_mode=87 hdmi_cvt 800 480 60 6 0 0 0" and "# for more options see http://elinux.org/RPi_config.txt start_x=1 gpu_mem=128"   I hope you can help me.