Realtek audio driver+ECS Motherboard

#1
Hello there I've got a Elite Group ECS MCP6100 motherboard with Rrealtek High definition audio.
The problem is that the front audio panel doesn't work until I plug in the back panel some audio jack. I've tried to install a new driver version, on Windows XP but none worked. In Linux everything works without a touch.
Can someone help me with that?