Scope
This document applies to Telos Z/IP Stream X/20 software running on the following Windows operating systems, where X/20 previously produced only silent audio on the lock screen.
Windows 11 25H2
Windows Server 2025 24H2
Microsoft has introduced a registry fix to address this.
Important
The Windows Registry contains critical configuration settings for the operating system and installed applications. Incorrect modifications can result in system instability, application failures, or an unbootable system. Before making any changes, it is strongly recommended that you back up the registry and ensure you understand the steps being performed. Telos Alliance is not responsible for any issues resulting from improper registry modifications.
Changing the Registry
Open regedit
Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Audio
If the "Audio" key doesn't exist, right-click "Windows" and create one, and navigate to it
Create a new DWORD (32-bit) "ConfigureAudioOnLockScreen" with value 2
Restart the system
The "ConfigureAudioOnLockScreen" value means audio access during the lock screen is
0 - (Default) No audio playback or recording on lock screen (aside from OS defined exceptions)
1 - Audio playback allowed on lock screen. Audio recording isn't allowed
2 - Audio playback and recording allowed on lock screen
Official Source