Help troubleshooting X

[Randy Dawson]

Briefly:

X starts a window, (does not matter fluxbox, gnome, or whatever startup).

The mouse pointer does not show up.

This all worked OK with this install at one time.   And yes, I have removed and reinstalled several times, seems to work OK after a clean reinstall, but later quits working.
I did not change anything.
Is windows messing up with things, like the HOME directory, that cygwin X depends on?
What tools or trace debug log files, (and where are they) to track this problem down?

Randy