i8042prt

[Thierry Plouchart]

I'm getting a recurring problem relating to an overflow in my ring buffer
for my PS/2 mouse port. It says I can reconfigure the buffer size in the
device manager in the mouse properties and I've tried it but without any
results. If I check my event viewer and check out the online help files it
says it is cofigurable via the registry. I'm a bit reluctant getting in
there and messing around with it. Does anyone know more about this or how I
can increase the values otherwise. Any help would be appreciated. Thanks
Terry

 

[Thierry Plouchart]

Forgot to mention my problem. It causes the PC to momentarily freeze while
I'm using the keyboard or mouse.
Thanks

 

[Staiger]

Forgot to mention my problem. It causes the PC to momentarily freeze while

I'm using the keyboard or mouse.

Actually, I think that's the symptom, not the cause. Something is hogging
the processor for a brief moment, preventing it from servicing the mouse
buffer, which thus overflows when you move the mouse. That brief freeze you
notice is confirmation that the processor is away doing something other than
looking after the screen, keyboard and mouse.

So don't worry about the ring buffer. See what's stealing the processor
instead.

Mine does the same thing occasionally, and I haven't got to the bottom of it
yet. Any suggestions, anyone?

Staiger

 

[Triffid]

Actually, I think that's the symptom, not the cause. Something is hogging
the processor for a brief moment, preventing it from servicing the mouse
buffer, which thus overflows when you move the mouse. That brief freeze you
notice is confirmation that the processor is away doing something other than
looking after the screen, keyboard and mouse.

So don't worry about the ring buffer. See what's stealing the processor
instead.

Mine does the same thing occasionally, and I haven't got to the bottom of it
yet. Any suggestions, anyone?

Mouse movements generate interrupts, which should cause the processor to
stop what it's doing and process the interrupt. The symptom implies that
something - probably a faulty device driver - disables interrupts while
it does some critical processing, and fails to re-enable interrupts in a
timely manner.

I suggest ensuring you have the latest certified drivers for all devices.

Triffid

 

[Thierry Plouchart]

I will try to download every update I can for my PC. Thanks. I wonder how it
got this way? I have Media Center 2005. Might that be part of the problem?
I've added an extra 1GIG of RAM with no apparent change. Thierry