FOUND THE PROBLEM!

It was the OC-Guru SW from NVidia. I don't know why this happens, but once I closed it, the FFB is back!

Thanks for all the help, hope someone else also finds it helpful!

Couldn't find such an option in the drivers

Upgraded to 0.6P

No change.
Refresh does not make a change
Force strength is set to 100

Other ideas?

Hi Scawen,

Thanks for jumping on the thread. Answers:

Shift+C does not help (I don't see refresh button...)
Switching windows: When "Input when window is inactive is set to OFF, then switching to another window makes the wheel HARDER, while returning to the LFS makes is light (no feedback/resistence) again. When the setting is ON, switching windows has no effect and its always "light" - no ffb/resistance.

Here is the output of the deb.log:
May 04 22:49:37 LFS : 0.6M
May 04 22:49:37 timer resolution 1 ms
May 04 22:49:37 read config
May 04 22:49:37 get command line
May 04 22:49:37 preinit d3d
May 04 22:49:37 started Direct3D 9Ex
May 04 22:49:37 number of adapters : 1
May 04 22:49:37 adapter 0 - valid modes : 21
May 04 22:49:37 load font
May 04 22:49:37 -----
May 04 22:49:38 max texture size 16384
May 04 22:49:38 can do shadows
May 04 22:49:38 can do multi tex
May 04 22:49:38 create english file
May 04 22:49:38 initialisations
May 04 22:49:38 human system
May 04 22:49:38 tables
May 04 22:49:38 helmet
May 04 22:49:38 controllers
May 04 22:49:38 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:49:38 Added 5 axes
May 04 22:49:38 load objects
May 04 22:49:38 start intro
May 04 22:49:38 end of initialisation
May 04 22:49:38 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:49:38 Added 5 axes
May 04 22:49:38 Blackwood
May 04 22:49:40 Next LOD
May 04 22:49:40 Next LOD
May 04 22:49:40 Next LOD
May 04 22:49:40 Meshes : 12
May 04 22:49:40 init sound
May 04 22:51:12 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:51:12 Added 5 axes
May 04 22:52:03 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:52:03 Added 5 axes
May 04 22:52:27 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:52:27 Added 5 axes
May 04 22:52:43 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:52:43 Added 5 axes
May 04 22:52:52 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:52:52 Added 5 axes
May 04 22:53:02 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:53:02 Added 5 axes
May 04 22:53:31 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:53:31 Added 5 axes
May 04 22:54:01 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:54:01 Added 5 axes
May 04 22:54:12 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:54:12 Added 5 axes
May 04 22:54:13 Controller 1 (Thrustmaster T150 Racing wheel) :
May 04 22:54:13 Added 5 axes

Let me know what other info I can provide

Also tried to remove the whole LFS folder and re-install, still no FFB ((

eRactor works fine

Any ideas?

Deleted, new files created, no change...

Tried...

Same problem with T150... latest drivers, latest LFS, working on other sims (rFactor), no FFB on LFS...

Win 8.1 + T150

???