@nic
Trust me I tried everything before bumping in this thread:
1. Unfortunately this version of Panasonic Viega does not have any scaling option available (I already checked in the manual/remote/tv settings).
2. I tested the HDMI cable and switched it with a different one as well with the same sad result. As said, if I use another PC Win8.1, the dedicated video card recognize the Panasonic and scales the picture in the screen perfectly.
The fact that now, in the new built PC, the Intel driver recognizes the TV model but does not let you change the scaling let me wonder if the issue belongs just to the Intel driver.
I am in the process to add a dedicate card in this system as a workaround but I doubt the 150 PSU will handle it.