Windows 10: high DPC latency and audio distortion (crackling and popping sounds)

  1.    27 May 2018 #1

    high DPC latency and audio distortion (crackling and popping sounds)


    Hi guys,

    Yesterday evening I was watching some youtube videos when suddenly the sound cut out. I turned the volume back up only to find there was a loud staticky crackling pop as the only audio output. Audio output is fine on headphones.

    I have a Lenovo Yoga 920 (with highest specs) with Windows 10 home 64x bit. Since the issue arose, I have tried several things:

    - disable/enable drivers by REALTEK related to sound, and Qualcomm Wifi Network Adapter

    -Reinstall drivers via windows and directly via REALTEK website

    - Update Windows 10 OS as well as BIOS

    - Messed around with several battery plan settings

    - Restored PC to previous backup, then messed around with audio mixer. This helped, as there was no distortion until volume 20, but beyond that it was the exact same issue.

    - Lastly, I resorted to just resetting my computer (deleting all files, etc.)

    My next step would be to do a clean install of windows 10 but I need to be using my computer and was wondering if there is a better way.

    I believe this is a software/driver related issue as I was partially able to fix it by messing with the mixer settings (even when not having restored my PC). However, this "fix" doesn't work since I reset my PC...

    I installed LatencyMon, and the results are below:

    ____________________________________________________________________________________________________ _____
    CONCLUSION
    ____________________________________________________________________________________________________ _____
    Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.
    LatencyMon has been analyzing your system for 0:00:37 (h:mm:ss) on all processors.


    ____________________________________________________________________________________________________ _____
    SYSTEM INFORMATION
    ____________________________________________________________________________________________________ _____
    Computer name: DESKTOP-LGEOIBC
    OS version: Windows 8 , 6.2, build: 9200 (x64)
    Hardware: 80Y7, LENOVO, LNVNB161216
    CPU: GenuineIntel Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
    Logical processors: 8
    Processor groups: 1
    RAM: 16225 MB total


    ____________________________________________________________________________________________________ _____
    CPU SPEED
    ____________________________________________________________________________________________________ _____
    Reported CPU speed: 1992.0 MHz
    Measured CPU speed: 3593.0 MHz (approx.)

    Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.


    ____________________________________________________________________________________________________ _____
    MEASURED INTERRUPT TO USER PROCESS LATENCIES
    ____________________________________________________________________________________________________ _____
    The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.

    Highest measured interrupt to process latency (Ás): 929.927472
    Average measured interrupt to process latency (Ás): 8.979495

    Highest measured interrupt to DPC latency (Ás): 447.742857
    Average measured interrupt to DPC latency (Ás): 2.455677


    ____________________________________________________________________________________________________ _____
    REPORTED ISRs
    ____________________________________________________________________________________________________ _____
    Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

    Highest ISR routine execution time (Ás): 111.240964
    Driver with highest ISR routine execution time: ACPI.sys - ACPI Driver for NT, Microsoft Corporation

    Highest reported total ISR routine time (%): 0.009347
    Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation

    Total time spent in ISRs (%) 0.011471

    ISR count (execution time <250 Ás): 3448
    ISR count (execution time 250-500 Ás): 0
    ISR count (execution time 500-999 Ás): 0
    ISR count (execution time 1000-1999 Ás): 0
    ISR count (execution time 2000-3999 Ás): 0
    ISR count (execution time >=4000 Ás): 0


    ____________________________________________________________________________________________________ _____
    REPORTED DPCs
    ____________________________________________________________________________________________________ _____
    DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.

    Highest DPC routine execution time (Ás): 2023.446285
    Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation

    Highest reported total DPC routine time (%): 1.553956
    Driver with highest DPC total execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation

    Total time spent in DPCs (%) 1.770268

    DPC count (execution time <250 Ás): 85746
    DPC count (execution time 250-500 Ás): 0
    DPC count (execution time 500-999 Ás): 4786
    DPC count (execution time 1000-1999 Ás): 104
    DPC count (execution time 2000-3999 Ás): 1
    DPC count (execution time >=4000 Ás): 0


    ____________________________________________________________________________________________________ _____
    REPORTED HARD PAGEFAULTS
    ____________________________________________________________________________________________________ _____
    Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.


    Process with highest pagefault count: none

    Total number of hard pagefaults 0
    Hard pagefault count of hardest hit process: 0
    Highest hard pagefault resolution time (Ás): 0.0
    Total time spent in hard pagefaults (%): 0.0
    Number of processes hit: 0


    ____________________________________________________________________________________________________ _____
    PER CPU DATA
    ____________________________________________________________________________________________________ _____
    CPU 0 Interrupt cycle time (s): 0.591193
    CPU 0 ISR highest execution time (Ás): 111.240964
    CPU 0 ISR total execution time (s): 0.034046
    CPU 0 ISR count: 3422
    CPU 0 DPC highest execution time (Ás): 718.909639
    CPU 0 DPC total execution time (s): 0.306354
    CPU 0 DPC count: 27570
    ____________________________________________________________________________________________________ _____
    CPU 1 Interrupt cycle time (s): 0.245845
    CPU 1 ISR highest execution time (Ás): 13.325301
    CPU 1 ISR total execution time (s): 0.000238
    CPU 1 ISR count: 26
    CPU 1 DPC highest execution time (Ás): 727.685241
    CPU 1 DPC total execution time (s): 0.039950
    CPU 1 DPC count: 4244
    ____________________________________________________________________________________________________ _____
    CPU 2 Interrupt cycle time (s): 4.614998
    CPU 2 ISR highest execution time (Ás): 0.0
    CPU 2 ISR total execution time (s): 0.0
    CPU 2 ISR count: 0
    CPU 2 DPC highest execution time (Ás): 2023.446285
    CPU 2 DPC total execution time (s): 4.680427
    CPU 2 DPC count: 32869
    ____________________________________________________________________________________________________ _____
    CPU 3 Interrupt cycle time (s): 0.239530
    CPU 3 ISR highest execution time (Ás): 0.0
    CPU 3 ISR total execution time (s): 0.0
    CPU 3 ISR count: 0
    CPU 3 DPC highest execution time (Ás): 674.337349
    CPU 3 DPC total execution time (s): 0.042118
    CPU 3 DPC count: 4638
    ____________________________________________________________________________________________________ _____
    CPU 4 Interrupt cycle time (s): 0.173858
    CPU 4 ISR highest execution time (Ás): 0.0
    CPU 4 ISR total execution time (s): 0.0
    CPU 4 ISR count: 0
    CPU 4 DPC highest execution time (Ás): 873.683735
    CPU 4 DPC total execution time (s): 0.024456
    CPU 4 DPC count: 3729
    ____________________________________________________________________________________________________ _____
    CPU 5 Interrupt cycle time (s): 0.231268
    CPU 5 ISR highest execution time (Ás): 0.0
    CPU 5 ISR total execution time (s): 0.0
    CPU 5 ISR count: 0
    CPU 5 DPC highest execution time (Ás): 820.943775
    CPU 5 DPC total execution time (s): 0.084043
    CPU 5 DPC count: 6057
    ____________________________________________________________________________________________________ _____
    CPU 6 Interrupt cycle time (s): 0.156598
    CPU 6 ISR highest execution time (Ás): 0.0
    CPU 6 ISR total execution time (s): 0.0
    CPU 6 ISR count: 0
    CPU 6 DPC highest execution time (Ás): 554.286647
    CPU 6 DPC total execution time (s): 0.024860
    CPU 6 DPC count: 4525
    ____________________________________________________________________________________________________ _____
    CPU 7 Interrupt cycle time (s): 0.198202
    CPU 7 ISR highest execution time (Ás): 0.0
    CPU 7 ISR total execution time (s): 0.0
    CPU 7 ISR count: 0
    CPU 7 DPC highest execution time (Ás): 653.330321
    CPU 7 DPC total execution time (s): 0.088627
    CPU 7 DPC count: 7005
    ____________________________________________________________________________________________________ _____


    Thank you in advance for your help!
      My ComputerSystem Spec

  2.    27 May 2018 #2

    Hi, diagnosing this is not necessarily easy or straightforward. There are, however, threads on this forum which might give you some pointers. Please try searching the forum for 'stutter'.
      My ComputerSystem Spec


 

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