Visual psx jerking

[kev32b]

Hi I am stilling having with fax jerking when connected with psx I followed your manual to the letter and still having issues tried on two machines still have the same effect any ideas

[Phil Bunch]

Here's something to investigate, if convenient, based on my recent experiences.

Background:  my i7-2600K PC tower, with 16 GB of RAM, running Windows 7, had been stalling out with almost nothing running for some time.  For example, my Logitech wired trackball stalled out (unable to move the cursor for a couple of seconds).  I was able to reproduce this problem most of the time if I brought up a Notepad (simple plain-text editor) in a blank document and moved the cursor in a 75mm (3 inch) circle on top of the Notepad window.  The cursor would become immovable every few seconds, approximately.  This problem sometimes disappeared for perhaps an hour or two after rebooting.  I don't run PSX with scenery generators yet, so I don't have experience with that combination.

Hypothesis:  my PC was periodically seeking Bluetooth devices to mate with, and when it did that, my *wired* trackball and keyboard would stall out.

The cure for my PC:  disable the (unused) Bluetooth hardware driver in the Windows Device Driver app.  I continue to use my wired keyboard and trackball with *ZERO* interruptions and stalling out.

Suggestion: try to disable the Bluetooth hardware driver, or uninstall it.  

Since some computers have this problem and other similarly powerful or much less powerful computers don't, and in my situation it was not caused by PSX.  However, PSX can possibly (?) be hijacked by competing hardware devices and their associated software.

If Bluetooth interference isn't the problem, is there some other service or hardware you can try disconnecting as an experiment?  I assume PSX is sensitive to real-time control inputs - would it possibly be sensitive to a PC's polling of certain other "real time" devices or services?  Obviously, this experience and solution may not be relevant to anyone else's experiences and situation.

EDIT:  Minor grammar corrections, 11-7-14.

[kev32b]

I have relooked at the manual tried playing with cfg files and fsx still jerks

[Garry Richards]

Search the forum for stutter to find the various ways that this problem has been addressed. One of them might work for your system. The solutions are all external to VisualPSX.