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I have done a clean Natty install having bought a new SSD and find that in applications (ahem) such as Minecraft, and in the default web browser Firefox, the mouse scrolls too far .

So for example in Minecraft the mouse wheel jumps multiple items rather than one with each mouse wheel roll. With Firefox the page leaps quite a distance with each mouse wheel roll.

Any ideas where I might adjust this?

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Hello, if you have fully updated your system then this could be related to this bug. Not sure though. bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/791596 –  user8592 Jun 5 '11 at 16:31
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2 Answers

As a workaround, try unplugging your mouse and plugging it back in. I run into this issue when the mouse is plugged into my laptop when Ubuntu boots up. Using this workaround fixes the issue for me.

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This fixed it for me and I was pretty suprised! This fix was kinda surreal and like most folks I didn't believe it until I did it: Turns out some MS mice have a scrollwheel bug. As Tarek found, > Try unplugging the USB cable / dongle then plug back in. That's it! Now my mouse moves normally (one line at a time, not half a screen!) This worked even though I use a 4-port screen/keyboard/mouse KVM box ! Yeah! –  Michael Durrant Feb 6 '12 at 16:42
    
Thoughts on mice that don't plug in (ie, bluetooth)? –  Ken Oct 17 '12 at 0:43
    
Disconnect/Reconnect? TBH I have no clue why that works, but I imagine issue seems has something to do with a hand-off of the mouse control between two subsystems; the second taking the (incorrect) parameters from the first. –  Tarek Fadel Dec 4 '12 at 12:28
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Firefox scroll rate: http://xahlee.blogspot.com/2011/05/how-to-change-firefox-mouse-wheel.html

For changing X.org global scroll rate: How can I change the mouse's wheel scroll rate?

Did you search before posting?

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It's not a global setting that's the problem, or one with Firefox. It's that the JVM is reporting double ticks for each event. –  Ken Oct 17 '12 at 16:29
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