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[1.0]Mouse moves on its own whenever the game is active

Posted: Fri Aug 21, 2020 8:26 pm
by Jinnai
Hello,

as the title states, the second I launch Factorio, my mouse just slightly drifts to the bottom left of the screen. The only way to stop it, is to click somewehere on the second monitor, so that the game is not the active screen anymore. But when I make the window active again, the cursor moves again.

When I googled the issue, I came uopn this post:
For me (working in electronics and programming) this sounds more like electrical interference. Something like: High CPU usage -> high power demand -> high ripple on power lines. This propagates by wire to mouse (from gpu and cpu i assume this is stationary pc) and by coincidence this ripple in power supply makes optical sensor in mouse to detect some spurious movement. This can be easily tested: run factorio, move coursor to lower left corner (as it is moving top-right) and just unplug mouse. Factorio should not be able to detect that mouse is disconnected, but if cursor stops moving, then issue is within mouse itself.
When I unplugged my mouse, it still moved on its own. Also, all the other games I play work just fine. It even worked with previous versions of Factorio.

Other bugfixes I tried:

- Restarting my computer
- Redownloading and installing Factorio again
- Updating my mouse software (I use a Scimitar Pro RGB)

As it currently stands I can't play the game at all with this issue, so I'd really appreciate if someone has any advice on this.
Thanks!

Re: [1.0]Mouse moves on its own whenever the game is active

Posted: Fri Aug 21, 2020 8:29 pm
by Loewchen
Unplug whatever controller you have plugged in that has an analog stick.

Re: [1.0]Mouse moves on its own whenever the game is active

Posted: Fri Aug 21, 2020 8:32 pm
by Jinnai
I had my PS4 controller plugged in. Unplugging really solved this issue, thanks a lot! :)

Thread can be marked as solved. :)