1. wLhg's Avatar
    Some of you have a huge battery drain with "Unregistered Device SE" in standby-mode/the surface drains battery over night. See here, here and here. Maybe this women found the solution:

    Why My Surface Does Not Sleep - Battery Drain Problems - LoveMySurfaceLoveMySurface

    Here is what I did (and what you can do) to figure out why my (or your) Surface does not sleep:

    1. Open Command Prompt with elevated privileges - In Desktop Mode, right-click on the Start Button - Chose Command Prompt (Admin)

    2. Type the following (exactly, including spaces – you can use a “/” or a “-” before the switch):

    powercfg /requests

    3. Examine the results for any drivers or apps that are making requests.

    powercfg2__1.jpg

    In my case, the Nvidia Tegra Audio driver was constantly being used. This was curious as I was not doing anything with voice or audio on my Surface and hadn’t for quite some time. I restarted my Surface and re-ran the command above and got the same result. This told me that there was definitely something wonky about this driver.

    4. The fix: issue the following command to tell the system to ignore all power requests made by the audio driver

    powercfg /requestsoverride DRIVER nvaenum System

    TADA! – That fixed my problem!
    In case you’re wondering, I did test the audio after the fix and while playing a song I ran the powercfg /requests command and the driver did reappear. However, as soon as I stopped playing it, the driver no longer showed – this is normal behavior.

    If you’re having similar battery drain problems and your Surface does not sleep, try going through the same steps. You may have a different driver or application draining your battery. If so, simply substitute it for the nvaenum driver I had.
    02-17-2015 09:15 AM
  2. Jon4248's Avatar
    This shows up in my report as well, but doesn't seem to drain my battery much. I am using RT IR5

    screenshot-1-.png

    The only reason I can think of that sound would be running is for mail notifications...I hear them when my Surface 2 is sleeping.
    Last edited by Jon4248; 04-26-2015 at 03:22 PM.
    04-26-2015 03:07 PM

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