I believe I found the cause of the problem.
When running cygcheck on /usr/lib/libusb/libusb0.sys I get this:
$ cygcheck /usr/lib/libusb/libusb0.sys
c:/Cygwin/lib/libusb/libusb0.sys
Error: could not find usbd.sys <---- !!!!
C:\WINDOWS\system32\ntoskrnl.exe
C:\WINDOWS\system32\BOOTVID.dll
C:\WINDOWS\system32\HAL.dll
C:\WINDOWS\system32\KDCOM.dll
Copying usbd.sys from c:\windows\system32\drivers to /usr/lib/libusb makes
the problem disappear. After a reboot everything works.
Somehow the Cygwin libusb0.sys must link to usbd.sys with the full path
i.e. c:\windows\system32\drivers\usbd.sys instead of assuming that
usbd.sys is located in the same directory as libusb0.sys.
HTH
Ton van Overbeek
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