Do you have any add-ons in your Community folder? If yes, please remove and retest before posting.
No, all have been removed.
Are you using Developer Mode or made changes in it?
No. Only to provide diagnostic overlay in the provided video (link below)
Brief description of the issue:
When using TrackIR, mouse, joystick hats, panning or tilting of the camera results in significant framerate drops and stutter in SU5, including audio stutter. The impact of the problem appears dependent on the speed in which the user moves their head. It is essentially unavoidable with normal head movement. It is as if there is culling of the environment beyond the view port that is not “buffered” fast enough to support head tracking (forgive my terminology). I have tried increasing the smoothing of TrackIR, but it has to be increased to such a degree that it becomes frustrating to comfortably use, and still doesn’t resolve the issue.
Provide Screenshot(s)/video(s) of the issue encountered:
Update 4 August 2021: I have recorded a more detailed video using Task Manager and HW Monitor (see above) to look at usage and temperatures. The results are quite interesting. I have added this video to my original post also.
You can see the game runs smoothly and with a decent frame rate whilst the camera is static. CPU usage spikes immediately to 100% on all cores when panning around, and temperatures increase 10-15 degrees. GPU usage actually drops slightly during panning, and generally remains well utilized throughout. RAM is incredibly underutilized at 4GB, and VRAM is equally low at 5 of 11GB available.
In the second half of the video I use the aircraft to pan by banking sharply, to demonstrate the problem is not with TrackIR, but with the in game viewable or rendered area. Whilst the video is not as smooth as what I was witnessing, it was generally unplayable when looking around.
Detail steps to reproduce the issue encountered:
Head tracking with TrackIR, also noticeable with mouse panning. The issue should be easily repeatable.
PC specs for those who want to assist (if not entered in your profile)
NVIDIA driver version: 471.41
OS build: 19043.1110
4790K (hyperthreading on/off), 1080TI, 16GB DDR3, SSD 850 EVO 500GB, 3440x1440.
Build Version # when you first started experiencing this issue:
Are you on the Steam or Microsoft Store version?
Did you submit this to Zendesk? If so, what is your ticket #?