@GG547, Welcome to the HP Support Community!
I suggest you try the below steps to resolve the issue:
Find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e96c-e325-11ce-bfc1-08002be10318}\xxxx\PowerSettings
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where 'xxxx' is one of keys which contains
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DriverDesc value 'Realtek High Definition Audio'.
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Note: There may be multiple ones containing PowerSettings,
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for example 'Nvidia High Definition Audio'.
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You'll find there three binary values and set them:
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ConservationIdleTime = ff ff ff ff;
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IdlePowerState = 00 00 00 00;
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PerformanceIdleTime = ff ff ff ff.
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Default values are all 00 00 00 00 which disables power settings,
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but driver overrides it with 0a 00 00 00
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which is 10 seconds (0x0a = 10) and is by default in the driver.
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Update the BIOS
If the issue persists, please follow the suggestions of the HP Guided Troubleshooter:
Click here to access it (simply select your description of the issue from the bottom of the screen to gain access to the next set of steps that should resolve your concern).
Hope this helps! Keep me posted.
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Have a great day!