Windows 10: High DPC latency from acpi.sys on HP Envy

Discus and support High DPC latency from acpi.sys on HP Envy in Windows 10 Drivers and Hardware to solve the problem; <p>Hi, I know this has been discussed before, but thought I would just raise a flag. </p><p>I took delivery this morning of a new&nbsp;HP ENVY Laptop... Discussion in 'Windows 10 Drivers and Hardware' started by Rogerl_uk, Nov 17, 2020.

  1. ROGERL_UK
    Rogerl_uk Win User

    High DPC latency from acpi.sys on HP Envy


    <p>Hi, I know this has been discussed before, but thought I would just raise a flag. </p><p>I took delivery this morning of a new&nbsp;HP ENVY Laptop 17-cg1000na 2020 Edition with NVIDIA&reg; GeForce&reg; MX450 and the first app I loaded was LatencyMon. Having disabled the network driver it still reported high DPC latency because of the ACPI driver! The highest execution time on ACPI.sys was 1.89ms which is more than 3x the next worst driver.</p><p></p><p>As this is a Microsoft driver is this going to be an issue for all Windows laptops for real-time music production and gaming?</p><p></p><p>Your thoughts would be appreciated, especially from MIcrosoft about why this long-standing issue cannot be resolved.</p><p></p><p></p>

    :)
     
    Rogerl_uk, Nov 17, 2020
    #1
  2. CHAUNDRARADDATZ
    ChaundraRaddatz Win User

    High DPC latency

    I use my Dell XPS for recording and live playback but the system suffers from high DPC latency caused by ACPI driver.

    I removed Dell audio drivers and installed those from RealTek with no avail. Latency is an issue because I need this computer for live recording. Please your advice.
     
    ChaundraRaddatz, Nov 17, 2020
    #2
  3. LE JESTER
    Le Jester Win User
    High DPC Latency caused by wdf01000.sys

    Hello,

    I am posting this regarding a problem that I ran across in my laptop at the beginning of august 2019, the problem is that I am getting high DPC Latency levels that are apparently caused by wdf01000.sys according to the latency checking
    program, latencymon.

    I really want to know if there is a fix since I have browsed a wide range of sites trying to find a fix, I could not find any. And also my keyboard stopped working for some reason, if its ok I would like to find a fix for that, but
    I prioritize fixing the high latency over the keyboard.

    Thank you for taking your time to read this.
     
    Le Jester, Nov 17, 2020
    #3
  4. SPIRITX MS MVP
    SpiritX MS MVP Win User

    High DPC latency from acpi.sys on HP Envy

    DPC Latency High

    Hi,

    Check these:

    Solving DPC Latency Issues - Download Latency Monitor and DPC Latency Checker

    Solving DPC Latency Issues | Sweetwater

    DPC Latency Checker

    Troubleshoot Driver Problems Using DPC Latency Checker | Free Easy-to-Follow Windows Tutorials

    DPC Latency Checker - Download

    http://www.thesycon.de/eng/latency_check.shtml

    Hope this helps.

    --------------------------------------------------------------------------------------------

    Rob Brown -
    Microsoft MVP     <- profile - Windows and Devices for IT : Bicycle - Mark Twain said it right.
     
    SpiritX MS MVP, Nov 17, 2020
    #4
Thema:

High DPC latency from acpi.sys on HP Envy

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