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gr8vision
1 Copper

Dell Inspiron 5547 choppy audio output via HDMI - widely reported problem by many users

I have the same audio output (via HDMI to TV) problem with the Dell Inspiron 5547 laptop.

1) Windows is 8.1, has all the latest updates from Microsoft.

2) BIOS is of the latest version. Every driver that Dell had as an update for this computer has been installed. Everything is up to date.

3) Background programs are kept to the minimum. Making sure that HD, RAM and CPU utilization are low by monitoring the Resource Monitor. I even followed advice of Latency Monitor, and turned off the Page File memory caching. Plus the laptop is plugged into electric outlet, and is working in Performance Mode with CPU not being in energy saving mode.

4) HDMI cable is new and very good, and works fine with two other OLDER computers. So the problem is not with the cable or TV set. 

When will DELL finally fix this, and release improved drivers that will take care of this problem?

Computer name: OMEGA5
Windows version: Windows 8.1 , 6.3, build: 9600
Windows dir: C:\Windows
Hardware: Inspiron 5547, Dell Inc., 0598GM
CPU: GenuineIntel Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz Intel586, level: 6
4 logical processors, active mask: 15
RAM: 12760080384 bytes total


DPC Latency Checker V1.4.0 states: Some device drivers on this machine behave bad and will probably cause drop- 
outs in real-time audio and/or video streams. To isolate the misbehaving driver use Device Manager and 
disable/re-enable various devices, one at a time. Try network and W-LAN adapters, modems, internal sound devices, 
USB host controllers, etc.


REPORT
_________________________________________________________________________________________________________
In Depth Latency Tests has been analyzing your system for 0:15:32 (h:mm:ss) on all processors in the system.

Test performed: Tight Loop Latency Test at HIGH_LEVEL IRQL
Tight Loop Latency Test at HIGH_LEVEL IRQL: measure SMIs and CPU stalls. Run test with all maskable interrupts 
disabled.
NOTE: SMIs that are initiated by software have not been measuded.


Highest latency measured: 246.75625 µs
This value reflects the highest measured interruption interval of a tight loop spinning at HIGH_LEVEL interrupt 
request level.


_________________________________________________________________________________________________________
PER CPU MEASURINGS
_________________________________________________________________________________________________________
Highest latency on CPU 0: 243.76267 µs
Highest latency on CPU 1: 243.76267 µs
Highest latency on CPU 2: 246.75625 µs
Highest latency on CPU 3: 243.76267 µs


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: 
OS version: Windows 8.1 , 6.2, build: 9200Highest latency on CPU 3: 
243.76267 µs
Hardware: Inspiron 5547, Dell Inc., 0598GM
CPU: GenuineIntel Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
Logical processors: 4
Processor groups: 1
RAM: 12168 MB total

LatencyMon v6.50

Your system seems to be having difficulty handling real-time audio and other tasks. You may experience drop outs, 
clicks or pops due to buffer underruns. 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 0:06:05 (h:mm:ss) on all processors.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: 
OS version: Windows 8.1 , 6.2, build: 9200 (x64)
Hardware: Inspiron 5547, Dell Inc., 0598GM
CPU: GenuineIntel Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
Logical processors: 4
Processor groups: 1
RAM: 12168 MB total


_________________________________________________________________________________________________________
CPU SPEED
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Reported CPU speed: 2394 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): 350.676121
Average measured interrupt to process latency (µs): 5.696213

Highest measured interrupt to DPC latency (µs): 347.254890
Average measured interrupt to DPC latency (µs): 1.126994


_________________________________________________________________________________________________________
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): 95.551378
Driver with highest ISR routine execution time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft 
Corporation

Highest reported total ISR routine time (%): 0.019762
Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, 
Microsoft Corporation

Total time spent in ISRs (%) 0.023807

ISR count (execution time <250 µs): 31796
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


_________________________________________________________________________________________________________
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): 1493.572264
Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), 
Microsoft Corporation

Highest reported total DPC routine time (%): 0.103232
Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, 
Microsoft Corporation

Total time spent in DPCs (%) 0.206558

DPC count (execution time <250 µs): 247576
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 84
DPC count (execution time 1000-1999 µs): 1
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 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.

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: onenoteim.exe

Total number of hard pagefaults 3578
Hard pagefault count of hardest hit process: 1457
Highest hard pagefault resolution time (µs): 1259105.652464
Total time spent in hard pagefaults (%): 2.780403
Number of processes hit: 13


_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 1.425735
CPU 0 ISR highest execution time (µs): 95.551378
CPU 0 ISR total execution time (s): 0.099250
CPU 0 ISR count: 9473
CPU 0 DPC highest execution time (µs): 1493.572264
CPU 0 DPC total execution time (s): 0.913732
CPU 0 DPC count: 151673
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 2.417298
CPU 1 ISR highest execution time (µs): 42.462824
CPU 1 ISR total execution time (s): 0.248893
CPU 1 ISR count: 22323
CPU 1 DPC highest execution time (µs): 690.977444
CPU 1 DPC total execution time (s): 1.344780
CPU 1 DPC count: 66108
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 0.930539
CPU 2 ISR highest execution time (µs): 0.0
CPU 2 ISR total execution time (s): 0.0
CPU 2 ISR count: 0
CPU 2 DPC highest execution time (µs): 449.140769
CPU 2 DPC total execution time (s): 0.567102
CPU 2 DPC count: 21154
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 0.735379
CPU 3 ISR highest execution time (µs): 0.0
CPU 3 ISR total execution time (s): 0.0
CPU 3 ISR count: 0
CPU 3 DPC highest execution time (µs): 401.510025
CPU 3 DPC total execution time (s): 0.195047
CPU 3 DPC count: 8726
_________________________________________________________________________________________________________

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1 Reply
daytonaoh
1 Copper

RE: Dell Inspiron 5547 choppy audio output via HDMI - widely reported problem by many users

it's been 11 months -- nothing in terms of solutions or even responses from Dell?

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