Same thing here, the game doesn't detect my Micrsoft X5 mouse (under Windows 7 x64 SP0 with latest "windows update" intellimouse drivers), didn't try a PS/2 mouse yet but it can be worth trying if its a kind of "game not aware of USB" problem ...

In the interest of giving people a few more options for stuttering mouse issues:

1) Do not set vertical sync to "force off" for your video card - this was causing the stuttering for me.

2) A Windows 7 mouse fix: http://donewmouseaccel.blogspot.com/2010/03/markc-windows-7-mouse-acceleration-fix.html (I don't know if this will work or not for Shogo. If it doesn't, just re-apply the WindowsDefault.reg that is provided).

for me the only fix is open autoexec.cfg find "MaxFps" "0" if its not there add it exactly change 0 to 60 and thats it no need to use vsync or triple buffer. it also fix abnormal speed ups

Have we solved this issue yet? My mouse is one of the ones that totally does not work. I can't even use it on the Menu screen. Anything?

Bit late to reply but it seems you have to manually add the Mouse commands to the autoexec.cfg file in your shogo directory. Changing them in the game menu doesn't work. Combined with the info in this post:
http://www.gog.com/en/forum/shogo_mobile_armor_division/use_your_mouse_wheel_for_changing_weapons
I managed to get my mouse working in Win7/64 by adding the following to the end of autoexec.cfg:

enabledevice "##mouse"
rangebind "##mouse" "Button 0" 0.000000 0.000000 "Fire"
rangebind "##mouse" "Button 1" 0.000000 0.000000 "DoubleJump"
rangebind "##mouse" "Y-axis" 0.000000 0.000000 "Axis2"
scale "##mouse" "Y-axis" 0.002375
rangebind "##mouse" "X-axis" 0.000000 0.000000 "Axis1"
scale "##mouse" "X-axis" 0.002375
rangebind "##mouse" "Wheel" -10000.000000 -0.100000 "PrevWeapon" 0.100000 10000.000000 "NextWeapon"

I tried to get my middle button (Button 2) to work but this kept messing things up. Anyway the mouse works for me now.

Excellent work! It works perfectly and I can finally enjoy playing this game.
Thank you very much Endominius

Regards,
FashionHosiery

For me, I have a Logitech G402 and set it to 800DPI. I turned mouse sensitivity all the way down, and mouse smoothing to max. Also, disabled enhance pointer precision in windows. That seems to have solved my jitter. Windows 7 64 Ultimate

Late to help but the mouse stuttering should be fixed if you set your USB polling rate to 125Hz. Modern mice polling rates are up to 1000Hz which was unheard back in the day. Most gaming mice software allow to downgrade it.

I can use the mouse in the game, but for some reason I cannot map any of the buttions on the mouse to fire weapons, etc. How can I fix this?

for some reason this didn't do anything for me, although it sounded like it made sense. well, maybe it did do something (couldn't tell), but certainly not enough to make mouse movement feel good enough.

how i ultimately "fixed" the mouse movement, was setting both "maxfps" and "inputrate" to 60 in the autoexec.cfg, and now my mouse movement feels alright.

i keep seeing the number 50 pop up, rather than 60.. makes me wonder if the engine was optimized for 50fps specifically?
though, most settings default to 30 in this game, which could mean that it was actually optimized for 30.

anyway - "inputrate" in the autoexec file refers to the in-game "smoothness" option. if you use the slider, it goes from 1 to 39 (for some reason). and just like a few other options, the value defaults to 30.
however, if you use the console to set its value, you can go as high as you want. though if you set it too high, you will get a lot of "mouse drag". (or at least i did)


TLDR: what made mouse movement OK for me was:
"MaxFps" "60"
"inputrate" "60"


edit: polling rate only seems to make a difference if you have very high, or very low (<34 in my case) fps.