[quake2] Highly erratic mouse behavior

Julien Langer jlanger at zigweb.de
Thu Mar 17 06:49:51 EST 2005

On Sa, 2005-03-12 at 17:35 +0100, Anders Storsveen wrote:
> I'm 100% sure that this problem is mouse accelleration related. I have  
> been whining about this for years now, linux
> seems to have mouse accelleration that is impossible to turn off... It's  
> like this in every game! I've posting
> around the net on this, and no one seems to figure it out.
> I've done xset m 0 0 and set the mouseaccel to 1x in kde. but nothing  
> works.
> If you try to move the mouse very slowly you will get the following  
> artifacts, in SDL you will get no or slow
> movment, and in glx you will get negative movment and if you speed up a  
> little you will get zero movment and then
> correct movment again. I'm definantly sure that this is some problem with  
> how X or some other backend handles mouse
> and mouse accelleration. I'm also betting that, in regular x with mouse  
> acceleration set to "off" there is still
> mouse acceleration, even though it is hard to detect.
> If someone made an app that compared raw mouse input to the length  
> actually moved on the desktop I'm sure the
> length would change dependant on the speed, even though the physical  
> length moved stays the same. But what I'm sure
> of is that mouse acceleration in the game is what this problem is, it also  
> affects other games including quake3!
> It's stupid to have to dualboot to windows to play games that are native  
> in linux and performes very well (and even
> better in the case of q3) in linux when compared to windows.

I don't see such a behavior on my machine.
No matter how fast I move the mouse, the distance it covers is always
the same... in q2 and in q3.
And I have even enabled mouse acceleration in Gnome.

But it's true that there's no movement with SDLGL if the mouse is moved
very slow.

More information about the quake2 mailing list