Emulator

Game Name?

N/A

Game ID? (right click the game in the game list, Properties, Info tab)

N/A

MD5 Hash? (right click the game in the game list, Properties, Verify tab, Verify Integrity button)

N/A

What's the problem? Describe what went wrong.

USB2.0 Mouse movement stutters while Dolphin is open.

What steps will reproduce the problem?

Boot Dolphin

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

Yes, 5.0-13242

Is the issue present in the latest stable version?

No, 5.0

If the issue isn't present in the latest stable version, which is the first broken version? (You can find the first broken version by bisecting. Windows users can use the tool https://forums.dolphin-emu.org/Thread-green-notice-development-thread-unofficial-dolphin-bisection-tool-for-finding-broken-builds and anyone who is building Dolphin on their own can use git bisect.)

Tool thread heading states the tool is currently broken so I didn't try.
But I've been dealing with this issue for a few months now I believe, I think build 12887 does not have the bug.

If your issue is a graphical issue, please attach screenshots and record a three frame fifolog of the issue if possible. Screenshots showing what it is supposed to look like from either console or older builds of Dolphin will help too. For more information on how to use the fifoplayer, please check here: https://wiki.dolphin-emu.org/index.php?title=FifoPlayer

N/A

What are your PC specifications? (CPU, GPU, Operating System, more)

i7-5700HQ, GTX 950M, Windows 8.1

Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)

It seems to only apply to my USB2.0, and USB3.0 "Supercharger" port, using my 2 other USB3.0 ports doesn't cause the issue. This is all on a GP72 2QE Leopard Pro laptop form MSI.
https://www.msi.com/Laptop/GP72-2QE-Leopard-Pro/
Since it is port-specific, I can't imagine it's happening on many other PCs... And the ports that don't experience the bug are the ports that I use with my GC-Adapter and controllers, whose devices I have applied Zadig to.
I'm wondering if it's related to this bug: https://bugs.dolphin-emu.org/issues/12234