I find this problem is related to DGA.
How to test:
1.Start nexuiz with glx (nexuiz-linux-glx.sh) 2.Go to setting->input 3.Check "Turn off OS mouse acceleration" (tip -> "Make use of DGA mouse input")
than it should behave like nexuiz-linux-sdl.
I think SDL is using DGA for mouse input & this is the problem.
I find this problem is related to DGA.
How to test:
1.Start nexuiz with glx (nexuiz- linux-glx. sh)
2.Go to setting->input
3.Check "Turn off OS mouse acceleration" (tip -> "Make use of DGA mouse input")
than it should behave like nexuiz-linux-sdl.
I think SDL is using DGA for mouse input & this is the problem.