G27 disconnects (only with steam games)

[Marco Versele]

Hi, My Logitech G27 steering wheel disconnects after about a minute of game time. That's happening when I play Steam games, and not when I play a game out of steam (Live For Speed).
I spent some days checking and cleaning the inside of my G27, reinstalling games, deleting and reinstalling drivers (I reinstalled the lgs510_x64.exe driver of march 2016 meant for the G27), stopping services and restarting with clean boot. Nothing helps.
As the wheel works good in LFS, it must be somewhere in the steam software??
Anyone an idea?