***************** I will post the fix for this problem at the end of this post! *****************
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Same problem. After playing some weeks (incl. beta) without problems, I tried the Commander-Mode yesterday. After that, my mouse shows exactly the same problems. The mosue react, but the X and Y axis isn't working. The pointing of the character moves slowly to heaven.
I tried: reinstall mouse-driver, BF4-Reinstall (the option at Origin), other USB-Port, other mouse.
System: Windows 7 64bit, Mouse: Razr Imperator and Logitech G3
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just talked to the support. They sent me a workaround (a user.cfg, but dosn't fix the issue). Now I have to send MSInfo and Tracert. I will keep you informed.
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The EA support has no idea and never intends to develop a solution to my several requests. Now, here's the fix for this issue, as I promised:
This is, what fixed my Problem: Disconnecting my joystick from USB fixes problems with the mouse. Seems that the axis-signals by the joystick is making trouble to the axis-signals of the mouse. My advise: Disconnect every hardware from USB you don't need for BF4. At my system the problem was a joystick, other users reports the same problem caused by wheels etc.
Hope, this will help.