I have a 25-unit computer lab that are hooked up to Dell Optiplex 960s. It seems that every time the computer goes into standby, or is left alone for long enough, it resets the refresh rate to 85 hertz.
This is outside the range of our 17' LCDs which proceed to display an "Out of Range" error until we either reboot in VGA mode, or remote in and change the desktops manually.
Recently I applied a GP that runs a change resolution app on logon and logoff, so it's kludged for now; but it's cropping up on other computers that are less often used and that the GP isn't helping.
Is there a reason it keeps resetting the refresh rate after an idle period of time? How do I prevent it?