[Dri-devel] Re: [Dri-users] Mouse lag in Quake3

[AMD-760MP <wy...@ic...>]

> On Sun, Apr 01, 2001 at 11:05:35AM -0600, gs...@sp... wrote:
>
> > This may or may not have anything to do with your situation, but I
> > noticed a distinct improvement when I switched from using a serial mouse
> > to using a PS/2 mouse. I got a lot more control and my skill level in
> > quake3 went up instantly.
>
> To further perpetuate this insanely off-topic thread, using a USB mouse
gets finer control.  I'm not sure about lag, but there's certainly a lot
more precision.  As a matter of fact, when I switched from my PS/2 trackball
to a USB trackball using the PS/2 *adapter*, the precision went up.  It's
the same model (Logitech Trackman, PS/2 was 3-button, USB was with wheel),
but they respond very differently.  One day soon I'll get the balls to
actually set up USB support...

Further abject apologies for perpetuating this, but USB is getting pretty
easy to do, with recent 2.4.X kernels. GPM is still hit and miss for me, but
X is very easy, and gives an even bigger boost. The finer control evidenced
with a USB pointer and a PS/2 adapter is due to the device still measuring
and moving at a high rate internally, and then downsampling to PS/2 rates.
I'm not sure, but USB on PS/2 adapters may increase the default PS/2 polling
rate to adapt... Basically, from lowest performance to highest, it currently
goes serial-PS/2-USBw/adapter-USBnative

I have a Logitech Trackman Marble+ Wheel working perfectly since 2.4.0-test2
or so. I'd be happy to try and help anyone who wants to get USB pointers
working. I'll be quiet now and let the OT topic die.