Win HOW TO - Fix Loss of HDMI Audio After Resume from Sleep Using an EDID Override
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3. DISABLE REQUIRED DRIVER DIGITAL SIGNATURES (aka TEST MODE)

Before installing the INF created by MonInfo, we must disable some security put in place by Microsoft to circumvent malicious driver installation. This step is only necessary if using Windows 8 or Windows 10.

If you attempt to install a new driver for the display device using Update Driver and selecting the INF, the following message will appear:

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We will get around this by turning off driver digital signatures in Windows.

Turn Off Driver Signature Enforcement by Entering Advanced Startup Options:
  1. Type cmd in the Start Menu;
  2. Open Command Prompt;
  3. Type or copy and paste (note the spaces): shutdown /r /o /f /t 00;
  4. Hit Enter;
  5. Select Troubleshoot from the Choose an option screen;
  6. Select Advanced options from the Troubleshoot screen;
  7. Then choose Startup Settings from the Advanced options screen;
  8. Click Restart;
  9. System will restart to an Advanced Boot Options screen;
  10. Choose Option #7, Disable driver signature enforcement;
  11. Windows will boot into Test Mode.
Advanced Startup Options:

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4. INSTALL EDID INF AS A NEW DRIVER

With driver digital signatures out of the way, we will install the INF as a new display driver.

Right-click, and select Display settings.

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Scroll down, and select Advanced display settings.

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Scroll down, and select Display adapter properties. A new window will pop-up.

Choose the Monitor tab, and click Properties.

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Choose the Driver tab, and click Update Driver...

Note: Uninstallation of any drivers or EDID override is possible from the Driver tab.

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Choose Browse my computer for driver software.

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Choose Let me pick from a list of device drivers on my computer.

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Click Have Disk...

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Select the MonInfo INF for your display. Ensure the INF is the only file in its folder or directory.

Click OK.

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A warning will appear. Select Install this driver software anyway.

The INF driver is installed.

Your device name should appear with the extension EDID Override.

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Returning to the Driver tab, MonInfo is listed as the driver provider. This implies the device is now perpetually connected under the credentials provided by the Monitor Asset Manager.

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If your screen didn't go blank, you are probably on your way...
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HOW TO - Fix Loss of HDMI Audio After Resume from Sleep Using EDID Override - by Warner306 - 2015-12-13, 02:40
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