"System" process high cpu usage after unplugging USB-C device with Hibernate enabled.

[Kross888]

I need help with the problem I have with my HP Spectre x360 13-apXX (late 2018). The problem occured if hibernate enabled and used at least once (entering & waking up from hibernate at least once).
If I use USB-C devices such as USB Hub or USB Ethernet or the included HP USB-C Multi Port Hub, after unplugging the USB Device there is CPU usage spike on "System" process in Windows. The System process continuously using about 20 - 30% CPU usage until I restart Windows. (USB A port doesn't have this problem even with the same device that can be used interchangeably with USB-A or USB-C connector).
If I use Sysinternal System Explorer and looking into System Process properties there is acpi.sys that continuously using CPU.
The problem can only be fix if I disable Hibernate. With Hibernate disabled, I can use any USB-C devices without problem.
I got this problem from the beginning I have this notebook. I have re-installed Windows twice but the problem persist.

(Using latest BIOS & all drivers updated)

[IT_WinSec]

Hello @Kross888 

Welcome !

• Is this a newly purchased machine ?
• Can you post your product number (p/n) -> here is how to find it -> https://support.hp.com/us-en/document/c03754824
• Can you click on Start, type winver and run the app. Based on the info it shows, let me know your Windows version and build that you use - e.g. 1903 , 1909, 2004, etc....
• Have you used HP Support Assistant ? If not, start it and ensure your drivers and BIOS are up to date (using this app)

• Download Autoruns (from Microsoft) from this URL => http://live.sysinternals.com/autoruns.exe

  Information about the product => http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx

  - Save the file on your Desktop

  - Run Microsoft Autoruns  with Administrator rights (right click -> Run as Administrator).

  Agree with the standard license agreement from Microsoft.

  - Once Autoruns is started, it will need some seconds (could be a minute) to gather the snapshot, wait for it.

  Once it is ready, you will see the word Ready in the lower left side.

  • Click on Options

  Make sure that only the following are selected:

Hide Empty Locations

Hide Windows Entries

• - Click on  Rescan button  or  click on File -> Refresh to rescan the system.

  It will need some seconds (could be a minute) to gather the snapshot, wait for it.

  Once it is ready, you will see the word Ready in the lower left side.

  - Finally, click on File -> Save

  Save the snapshot on the desktop in .TXT file

  Open the newly created TXT log file.

  Mark and Select all of the text (e.g. CTR+A), copy it and

  visit http://pastebin.com/  to paste it there

  Create new paste and give me the URL to see the log file.

Looking forward to your reply.

[Kross888]

Hi,

- No, I purchased this machine around March 2019.

- p/n: 5MC07PA#AR6

- Windows 10 Pro version 1909 (OS Build 18363.836)

- Yes I used HP Support Assistant and its say driver & BIOS Up-to-date.

- https://pastebin.com/zycNT511

[IT_WinSec]

Thank you for the prompt and accurate reply. Nothing strange appears in the Autoruns log.

Well, it appears to be either Windows 10 bug or driver issue.

Let us try with the latest 2004 version. Here is how to upgrade to it >> https://support.microsoft.com/en-gb/help/3159635/windows-10-update-assistant

Try first with the MS Windows 10 Update Assistant

Let me know how it goes

[Kross888]

Thank you for your reply.

But I rather wait for updating to 2004 maybe after Windows Update on my notebook deliver the update itself.

Besides I have going through fresh install, several BIOS updates, several drivers update, Windows update from 1809, 1903, 1909 so I am a little doubtful that 2004 update gonna fix the issue. We'll see.

I will update after updating Windows.

Maybe another idea about what could be the problem?

[Kross888]

I'm doing more experiment recently. When System process have high CPU usage, I disable Intel PCI Express Root Port #5 - 9DBC in Device Manager. And System process CPU usage drop back to normal. I tried plugging & unplugging USB-C devices and System CPU usage still normal.

I have this idea from reading post https://h30434.www3.hp.com/t5/Business-Notebooks/ProBook-450-with-high-CPU-usage/td-p/6520063/highli... Their problems seem similar to mine. Their problem was solved with BIOS update from HP.

[IT_WinSec]

Thank you for your update.

As mentioned by you, you can disable Hibernation and then it will work without issues. You may use Sleep mode, instead.

You might try updating to Windows 10 - 2004 and test

Your BIOS and drivers are already the latest version.

If it still does not work for you, consider contacting HP Support department >> https://support.hp.com/us-en/contact-hp

where you may create a case and have it tested in-depth.