Thanks to the great post from the reddit, I have done some experiment with the poll rate on the OS. And it has indeed improve the trackball responsiveness and precision - and actually improve the effeteness of the error correction implementations for the trackball.
I would like to get some feedbacks from people who have installed the firmware, can you try the following?
Edit with the following file privilege account:
/boot/firmware/cmdline.txt
Then append usbhid.mousepoll=8
If you have content already in the file, add a space with the setting without line break.
Save the changes, then, reboot.
This changes the polling rate to 125Hz rather than the system/hardware default.
As I was already a satisfied trackball user, my opinion might not really matter. But of course I tried the setting despite my satisfaction, and I get the impression that the movement has become a bit smoother and more fluid, but also a bit slower. I increased the mouse acceleration slightly in the Control Centre, and now the movement is more or less back to how it was before, but – as I said – I think it’s a bit smoother. The accuracy was already fine on my device.
I have a pre-release firmware, it has effect on the old version, but seems to have no effect on up-coming releases because I changed the rate in the firmware itself.
I’ve just installed the final 1.9 version and the sensitivity has increased significantly, so I was able to reset the mouse acceleration in the Control Centre to its original setting and even lower it. I’ve also removed the poll rate from cmdline.txt.
