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[seantrow]

I have a problem which occurs sometimes on my Win11 desktop system, but apparently only when JRiver is running.  Mouse tracking becomes laggy.  As I move my mouse about there is a delay between the frames of the cursor updating.  This delay is anywhere from "a bit" (making it sluggish) to "a lot" - maybe a second per update? - which makes the machine unusable. 

I don't have any direct reason to blame this on JRiver, other than circumstantial: closing JRiver invariably clears the problem, which I have not found to be true for any other application. 

I don't know exactly how long this has been occurring; only recently has experimentation pointed the finger at JRiver as the cause.  I could completely believe it is also affected by interaction with some other weird configuration of my machine. 

I have tried disabling various unnecessary features of JRiver (e.g. WDM driver, etc.) to no avail.  (My thinking was this sort of thing would have to be caused by some driver-level code, but perhaps I am wrong about that.)

I have noticed that this is worst when tracking across the desktop (i.e. the cursor is not over any application window.)  It *may* only occur in this situation.  This makes me wonder if there is perhaps some non-rectangular window explorer callback or something which might be the cause.  (This is just a stab in the dark, I don't know of any actual such actual callback.)

I am wondering if you have any idea of how I might diagnose the problem further.  This is really serious for me, if I can't fix it I will have to just stop using JRiver (which I've used for, like, decades...) I have already trimmed my usage quite a bit.

Thanks
Sean

[JimH]

Did you install any software specific to the mouse?  Logitech software used to cause a problem years ago.

Have you tried updating the video driver?

Did you do an Internet search?

[seantrow]

Thanks for the ideas here. I won't bore you with details but I tried a few things suggested by your comments - but unfortunately they didn't help.  I do have a few more ideas which I will follow up on and report back.

Sean