[Dx4win] Windows 7

Jim Reisert AD1C jjreisert at alum.mit.edu
Fri Feb 24 15:48:35 EST 2012


>From Joe W4TV:

http://groups.yahoo.com/group/microHAM/message/12395

In case you can't access the URL above, here is the text

The following changes in Windows appear to prevent Windows from
triggering the bugs [that] cause the lockup:

1) Always set the Windows Control Panel "Power Options" to "High
Performance" or "Maximum Performance" depending on version.

2) In the "High Performance" option"

    a) click on "Change Plan Settings" and set "Put the computer to
sleep" to NEVER.

    b) click on "Change advanced Power Settings", select "USB
Settings," followed by "USB Selective suspend setting" and set
Selective suspend to "disabled"

3) In Windows Device Manager, Universal Serial Bus Controllers double
click on *every* USB Hub (both USB Root Hub and Generic USB Hub),
select the Power Management Tab and clear (uncheck) the box marked
"Allow the computer to turn off this device to save power"

When closing the computer, always do a full (power off) shutdown - do
not select sleep, hibernate, or suspend.

These steps appear to prevent Windows from invoking sleep mode or
performing any hardware power down actions with the USB devices which
are what trigger the crash in d2xx.dll.


More information about the DX4WIN mailing list