Xorg and specific signal PC

[Revolver Onslaught]

Hello,

I recently purchased an FullHD 100Hz TV (Samsung LE40F86BDX) and a
Nvidia GeForce9500 with HDMI output.
This way, I can link my Linux on my TV.

However, I cannot switch to 100Hz when the PC is linked to the TV
(HDMI or VGA). I supposed it was a security but I was wrong : any of
the 1080p FullHD source (Bluray, Xbox 360, etc) I use can be viewed in
100Hz even connected via HDMI. In the TV manual, it is wrote that it's
the behaviour when PC is connected...

So, I deduce that my Nvidia card send a specific signal, like RVB does
(I suppose other cards have the same behaviour). This signal is then
"catched" by the TV and the 100Hz mode is no more available.


Is there any way to switch off this signal with Xorg even with a patch ?

Many thanks,
RO