i am officially throwing in the towel and giving up on pushing random buttons to try and get forza 8 to work. I do not have any background or affiliation with any hardware or software devs. I'm just a casual player that likes to google-fu stuff to see if I can get it to magically work lol.
There is something or several things (probably several) that are having some kind of compatibility issue or something. My wheel and pedals work as expected (nice way to say not great) on the PC version with the wheel in a normal pc configuration. The xbox version, at least with the series x, is having some really funky issues when trying to use my wheel in pro mode and using the drivehub configuration. There is absolutely 0 vibration based feedback and there is no feeling of fighting the wheel when hitting the wall or losing control.
I did notice 2 odd things (there are probably more but it's just not worth any more time or effort to discover)...
The first one is that the RPM lights on the G Pro wheel base (not drivehub) are completely inactive or possibly getting disabled somehow...no matter which way I try to set the RPM lights, there is 0 activity on the lights.
The second and way more odd thing is in regards to adjusting the brake force on the wheel base. The amount of resistance/strength is inversed. IF you adjust the value to a higher level, the brake pedal will get lighter isntead of heavier. If you adjust the value to a lower level, the brake pedal will become heavier.
So yeah, I seriously do not recommend trying to play Forza 8 using the G Pro with the drivehub. Just walk away and do not waste your time.
On a much better note, I tried on Dirt Rally 2.0 because the LogitechG Pro Settings page recommends setting he trueforce audio to 100 and it is available with the game pass thing. One odd thing I see in the settings is that they recommend setting the wheel to G923 mode...I used the pro mode and did not attempt the compatibility mode. I'm not much of a fan of rally games, but WOW! The wheel felt absolutely amazing in this game. Trueforce feels like it is fully supported, and everything about the FFB and just overall feel felt absolutely perfect, maybe even better than AMS2 on PC, bu it's hard to pick which is better.
I have seen a lot of people recommend trying out Grid 2019 because this wheel is fully supported in that game. Unfortunately, I couldn't try it out because it is not available through game pass or the online store in the xbox.
Oh and also figured I should mention this....I did the recommended 10 second shutdown, then did the turn on procedure to get the drivehub up and working. I went into Forza 8 and tried messing with the settings in-game and on the wheel for around 15 minutes and gave up. I did not close the game, just hit the xbox button on the wheel to take me back to the home screen. From the home screen, I started up Dirt Rally 2.0 using the wheel and did not readjust any of the settings in the wheel prior to starting dirt rally. I wanted to see how the wheel would respond in the game with the game set to all of its default modes. I selected the free roam option, picked some random car and location and started the free roam. At the exact moment the countdown in the game finshed and handed the controls over to me, the trueforce sprang to life and immediatly told me that trueforce is here and ready to have some fun.
So without restarting the drivehub, wheel or xbox I was able to go from one game that is 100% broken and unusable in my opinion (even if this was using a super cheap budget focused setup, I would call it unusable if it felt this way)....then go directly into another game (emphasis again on the fact that nothing needed to be restarted, and all deviced maintained their initial handshake, completed the steps to enter their necessary communication protocols and maintained polling and data transfer without user based interruptions like resets, etc) that is working absolutely perfect and my dd11, pro pedals and drivehub did all of the necessary procedures to become an exact clone of the xbox/pc version of the wheel base....at least from what I can tell, but please keep in mind that this is just my opinion and I am probably at a slightly below to just about average skill level sim driver/racer.