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PLTGC.sys dpc latency causing audio pops/clicks?
hello, i've been having some annoying trouble with my headphones (plantronics gamecom 780) making pop/click noises when audio starts or stops sometimes, sudden audio level changes, or just randomly in the middle of it. i've tried so many things at this point such as updating bios, all my drivers, disabling all other audio programs, toying with playback settings, power management settings in control panel, different driver versions and nothing has worked so far. i'm hoping someone will be able to help me as this is extremely annoying listen to music with intermittent popping/clicking noises and some voice communication in games. if any more information is needed i'll gladly post more. thanks for reading.
here is a screenshot of my latencymon screen when running it
http://puu.sh/ntKDu/adc2103bb5.png
and here is the latencymon report
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CONCLUSION
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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. 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 0:04:36 (h:mm:ss) on all processors.
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SYSTEM INFORMATION
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Computer name: JORDAN-PC
OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware: ASRock, 970 Pro3 R2.0
CPU: AuthenticAMD AMD FX(tm)-6300 Six-Core Processor
Logical processors: 6
Processor groups: 1
RAM: 8148 MB total
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CPU SPEED
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Reported CPU speed: 3492 MHz
Measured CPU speed: 1 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.
WARNING: the CPU speed that was measured is only a fraction of the CPU speed reported. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature.
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MEASURED INTERRUPT TO USER PROCESS LATENCIES
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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): 11890.457903
Average measured interrupt to process latency (µs): 14.249797
Highest measured interrupt to DPC latency (µs): 3741.82630
Average measured interrupt to DPC latency (µs): 9.594367
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REPORTED ISRs
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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): 176.644330
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0.083988
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in ISRs (%) 0.168633
ISR count (execution time <250 µs): 390441
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 0
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0
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REPORTED DPCs
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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): 3756.711340
Driver with highest DPC routine execution time: PLTGC.sys - C-Media Audio WDM Driver, C-Media Electronics Inc
Highest reported total DPC routine time (%): 0.868098
Driver with highest DPC total execution time: PLTGC.sys - C-Media Audio WDM Driver, C-Media Electronics Inc
Total time spent in DPCs (%) 1.284633
DPC count (execution time <250 µs): 2052380
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 21432
DPC count (execution time 1000-1999 µs): 0
DPC count (execution time 2000-3999 µs): 1
DPC count (execution time >=4000 µs): 0
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REPORTED HARD PAGEFAULTS
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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 2541
Hard pagefault count of hardest hit process: 1571
Highest hard pagefault resolution time (µs): 505679.629152
Total time spent in hard pagefaults (%): 1.565954
Number of processes hit: 15
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 25.814726
CPU 0 ISR highest execution time (µs): 145.561283
CPU 0 ISR total execution time (s): 1.153731
CPU 0 ISR count: 281346
CPU 0 DPC highest execution time (µs): 3756.711340
CPU 0 DPC total execution time (s): 17.640969
CPU 0 DPC count: 1710400
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CPU 1 Interrupt cycle time (s): 5.784089
CPU 1 ISR highest execution time (µs): 146.486827
CPU 1 ISR total execution time (s): 0.165804
CPU 1 ISR count: 11476
CPU 1 DPC highest execution time (µs): 126.472795
CPU 1 DPC total execution time (s): 0.377611
CPU 1 DPC count: 39193
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CPU 2 Interrupt cycle time (s): 4.917370
CPU 2 ISR highest execution time (µs): 119.313288
CPU 2 ISR total execution time (s): 0.185342
CPU 2 ISR count: 12188
CPU 2 DPC highest execution time (µs): 118.690435
CPU 2 DPC total execution time (s): 0.433772
CPU 2 DPC count: 46490
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CPU 3 Interrupt cycle time (s): 4.531096
CPU 3 ISR highest execution time (µs): 137.980813
CPU 3 ISR total execution time (s): 0.179006
CPU 3 ISR count: 12260
CPU 3 DPC highest execution time (µs): 120.687285
CPU 3 DPC total execution time (s): 0.406955
CPU 3 DPC count: 39827
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CPU 4 Interrupt cycle time (s): 4.463506
CPU 4 ISR highest execution time (µs): 133.741409
CPU 4 ISR total execution time (s): 0.212354
CPU 4 ISR count: 14426
CPU 4 DPC highest execution time (µs): 163.526060
CPU 4 DPC total execution time (s): 0.547658
CPU 4 DPC count: 68863
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CPU 5 Interrupt cycle time (s): 7.245301
CPU 5 ISR highest execution time (µs): 176.644330
CPU 5 ISR total execution time (s): 0.905143
CPU 5 ISR count: 58745
CPU 5 DPC highest execution time (µs): 130.760023
CPU 5 DPC total execution time (s): 1.933694
CPU 5 DPC count: 169040
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