SU5 seems to have degraded management of interrupts, causing it to be susceptible to cheap peripherals such as the Logitech Throttle Quadrant. This causes symptoms such as laggy mouse.
This particular quadrant (at least samples from the last couple of years) suffers from jitter, which itself seems to be caused by USB voltage fluctuations on the motherboard (and poor design of the quadrant for not being shielded against that).
Because of the jitter, when a lever is set to idle, it may trigger and untrigger the detente action multiple times per second. Prior to SU4 this would be ignored by the sim (or at least not trigger issues). In SU5 this seems to be causing so many interrupts that it interferes with the mouse, which suddenly becomes laggy.
Workaround is to plug the throttle quadrant into a powered USB hub for stable voltage - however it still shows a poorer management of interrupts in SU5 compared to SU4, where mouse remained smooth.
Do you have any add-ons in your Community folder? If yes, please remove and retest before posting.
No
Are you using Developer Mode or made changes in it?
No
Brief description of the issue:
In-game mouse cursor suddenly because extremely laggy, seems to resist mouse movement
Provide Screenshot(s)/video(s) of the issue encountered:
No.
Detail steps to reproduce the issue encountered:
Have a Logitech Quadrant plugged into a cheap motherboard USB. To check that it is the case, observe jitter on the Logitech Quadrant axes.
Once done, set at least one lever to idle, and have a detente function assigned to that level detente.
Check that the quadrant jitter causes the detente action to be triggered/untriggered multiple times per second because of the jitter.
Fly, and interact with the cockpit via mouse. After 5-10 minutes or so, mouse should become laggy (bonus points if you do it in VR - I fly in VR exclusively).
PC specs for those who want to assist (if not entered in your profile)
Build Version # when you first started experiencing this issue:
SU5 pre hot fix (also happens post hotfix 1 and hot fix 2)
Are you on the Steam or Microsoft Store version?
Microsoft Store
Did you submit this to Zendesk? If so, what is your ticket #?
#113852