High latency ACPI on clean Windows 11

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2026-02-07T08:47:29.0766667+00:00

Hello, I have had a problem with significant delays in ACPI for a long time. I have an HP Pavillion 15 cw-xxx laptop. Around the fall of 2024, I started having problems with the sound, namely, the sound crackles after a while.

I tried to solve it with the help of a lot of guides and so on, but nothing helped.

Here is a short list of what I tried to do to solve this problem:

Managing the laptop's power plan - setting it to high performance.

Opening hidden functions in the registry to manage the laptop's power settings and then changing the settings so that everything is at maximum performance.

Downloading drivers for my AMD chipset

Trying to download an older version of the ACPI driver from the Internet

Updating the BIOS to the latest version.

Resetting the BIOS settings to factory defaults.

And this is not the entire list of what I tried to do to reduce driver lag.

And now I have reinstalled a clean original version of Windows 11 Home and nothing has changed. I am also sending you the results of the LatencyMon program after testing the laptop with it.


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 0:03:41 (h:mm:ss) on all processors.


SYSTEM INFORMATION


Computer name: HP_PAVILLION

OS version: Windows 11, 10.0, version 2009, build: 26200 (x64)

Hardware: HP Pavilion Laptop 15-cw1xxx, HP

BIOS: F.55

CPU: AuthenticAMD AMD Ryzen 3 3300U with Radeon Vega Mobile Gfx

Logical processors: 4

Processor groups: 1

Processor group size: 4

RAM: 6057 MB total


CPU SPEED


Reported CPU speed (WMI): 210 MHz

Reported CPU speed (registry): 210 MHz

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 (µs): 4311,0

Average measured interrupt to process latency (µs): 62,561155

Highest measured interrupt to DPC latency (µs): 4305,10

Average measured interrupt to DPC latency (µs): 55,068358


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 (µs): 543,50

Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation

Highest reported total ISR routine time (%): 0,004954

Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation

Total time spent in ISRs (%) 0,006649

ISR count (execution time <250 µs): 11044

ISR count (execution time 250-500 µs): 0

ISR count (execution time 500-1000 µs): 1

ISR count (execution time 1000-2000 µs): 0

ISR count (execution time 2000-4000 µs): 0

ISR count (execution time >=4000 µs): 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 (µs): 9053,830

Driver with highest DPC routine execution time: ACPI.sys - ACPI Driver for NT, Microsoft Corporation

Highest reported total DPC routine time (%): 0,159590

Driver with highest DPC total execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation

Total time spent in DPCs (%) 0,562222

DPC count (execution time <250 µs): 358155

DPC count (execution time 250-500 µs): 0

DPC count (execution time 500-10000 µs): 2226

DPC count (execution time 1000-2000 µs): 38

DPC count (execution time 2000-4000 µs): 15

DPC count (execution time >=4000 µs): 5


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.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count: svchost.exe

Total number of hard pagefaults 96549

Hard pagefault count of hardest hit process: 73824

Number of processes hit: 48


PER CPU DATA


CPU 0 Interrupt cycle time (s): 7,973078

CPU 0 ISR highest execution time (µs): 543,50

CPU 0 ISR total execution time (s): 0,051583

CPU 0 ISR count: 7085

CPU 0 DPC highest execution time (µs): 9053,830

CPU 0 DPC total execution time (s): 3,405786

CPU 0 DPC count: 174824


CPU 1 Interrupt cycle time (s): 2,607312

CPU 1 ISR highest execution time (µs): 16,530

CPU 1 ISR total execution time (s): 0,001386

CPU 1 ISR count: 689

CPU 1 DPC highest execution time (µs): 753,260

CPU 1 DPC total execution time (s): 0,489182

CPU 1 DPC count: 59191


CPU 2 Interrupt cycle time (s): 2,878874

CPU 2 ISR highest execution time (µs): 6,280

CPU 2 ISR total execution time (s): 0,002016

CPU 2 ISR count: 1107

CPU 2 DPC highest execution time (µs): 526,840

CPU 2 DPC total execution time (s): 0,561520

CPU 2 DPC count: 65262


CPU 3 Interrupt cycle time (s): 3,013050

CPU 3 ISR highest execution time (µs): 8,010

CPU 3 ISR total execution time (s): 0,003972

CPU 3 ISR count: 2164

CPU 3 DPC highest execution time (µs): 386,440

CPU 3 DPC total execution time (s): 0,528669

CPU 3 DPC count: 61162


P.S. The only thing that really helps is completely removing the ACPI driver from the computer, but that doesn't suit me. That's why I'm here. Maybe you can help me. Thank you in advance!

Windows для дома | Windows 11 | Устройства и драйверы
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