it doesn't work after changing the parameters in /sys/bus/hid/logitech/XXXX:XXXX:XXXX:XXXX/spring_level

[anzhaicouzi]

Maybe this is a dumb question—after I changed the parameters, the feedback force still seems really small, just like before. I tried unplugging and plugging the USB back in, but it didn’t fix anything. really thanks!

[berarma]

What did you exactly do?

[anzhaicouzi]

Thanks for your reply! I’m trying to connect my Logitech G29 steering wheel to the VTD2020 simulation software on Ubuntu 18.04, and I want to use the lg4ff to control the feedback force on the wheel. After I loaded the lg4ff driver by the manual method, I found the parameter files in the location specified in the documentation, and I edited it using Vim. However, after making the changes, I noticed that the force feedback didn’t seem to be working on the steering wheel. I’m wondering if there’s something else I need to do after editing the file to apply the changes to the steering wheel. Thanks for your help!"

[berarma]

I would use Oversteer, another project of mine in Github. You could also try writing to the file with echo "100" > /sys/... as root. I haven't ever used vim for that, and I don't know if it would work since these are special files.

[anzhaicouzi]

Thanks for your reply! I found that the oversteer tool needs a newer version of Meson for compilation, but the latest version available on Ubuntu 18.04 is still below the required one. And I tried using echo to modify the parameters, and it worked—thanks a lot! The tools you developed are really useful for me!