[INFO] BF2042 Patch 8.8 (May 27) – Secure Boot Requirement for Supported Systems

Guide to Bypassing Euphonix Driver Issues with Secure Boot Enabled

Understanding the Problem
Euphonix hardware (audio/video control panels) often relies on legacy drivers that are not UEFI-compatible. When Secure Boot is enabled, the system enforces signature checks on all boot-time drivers, preventing unsigned or improperly signed drivers from loading. Since updated UEFI-compatible drivers may not be available, we need workarounds to allow the hardware to function while maintaining Secure Boot.

Step-by-Step Workaround

Check Secure Boot & Firmware Settings

• Enter BIOS/UEFI setup (usually F2/DEL during boot).
• Ensure Secure Boot is set to "Custom" or "Other OS" (some BIOS allow relaxed Secure Boot modes).
• Disable Fast Boot to prevent driver-loading issues.

Enable Test Signing Mode (Temporary Solution)

This allows loading unsigned drivers but weakens security:

• Open Command Prompt as Administrator.
• Run:

bcdedit /set testsigning on

• Reboot
• Install the Euphonix drivers normally.

Warning: This makes the system less secure. Disable it later with bcdedit /set testsigning off.

Manually Sign the Euphonix Drivers

If possible, sign the drivers with a custom certificate:

• Obtain a Microsoft Sysdev certificate (if available).
• Use SignTool to sign the .inf and .sys files:

signtool sign /fd sha256 /a "C:\path\to\driver.sys"  

• Enroll the certificate in BIOS (Key Management → Add Signature).

Use a Boot Entry with Driver Checks Disabled

Create a secondary boot option that skips driver enforcement:

• Open Command Prompt as Admin.
• Create a new boot entry:

bcdedit /copy {current} /d "Boot with Euphonix Support"

• Note the new {GUID} and configure it:

bcdedit /set {GUID} nointegritychecks on

• Set this as the default boot option only when needed.

Disable Driver Signature Enforcement Temporarily

• At boot, press F8 (or Shift + Restart → Troubleshoot → Advanced Options → Startup Settings).
• Choose "Disable driver signature enforcement".

Alternative Solutions

• Virtualization: Run the Euphonix hardware in a VM with PCI passthrough (if supported).
• Dedicated Legacy Machine: Use a separate PC without Secure Boot for Euphonix hardware.
• Check for UEFI Updates: Some vendors release firmware patches that relax Secure Boot checks.

Security Considerations

• Test Signing Mode reduces security—use only temporarily.
• Manual driver signing requires a trusted certificate.
• Disabling Secure Boot entirely is not recommended for production systems.

If none of these work, contacting Euphonix (or its successor, Avid) for updated drivers may be necessary.

For further details on Secure Boot bypass risks, see LogoFAIL vulnerabilities and UEFI bootkit threats.