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tkmops

Malwarebytes causing bad sound?

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There was a post by one of Malwarebytes technos,(a few weeks back) that to resolve the issue, while they are trying to fix it, we can 'roll back' to a prior version of Malwarebytes.


In my mind, that indicates that this 'bad sound' issue(something about increasing the cycles...which puts a strain on your CPU), was due to one of their updates sometime in Feb 2020.


Now, even though I've been a IBM mainframe hardware/software tech since the early '70's, I'm not a PC expert. But, there could be a case made, that a combination of Malwarebytes updates AND issues with Realtek audio and/or Network Adapters are causing the issue.


One of the ways to research this is to read all the lines of that update code, and then try to correlate it to possible impacts to the Realtek audio/Network drivers. 

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5 minutes ago, tkmops said:

...was due to one of their updates sometime in Feb 2020.

...

But, there could be a case made, that a combination of Malwarebytes updates AND issues with Realtek audio and/or Network Adapters are causing the issue.

The odd thing is I only started experiencing this issue shortly before my initial post on this topic (May 15th). My buddy has been experiencing this for several months. I have also found some different threads asking about the same/similar issues that go back years.

I agree that some combination of updates is causing this and that one factor (particularly Malwarebytes) is not solely to blame.

 

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My audio is going through HDMI to an LG OLED TV: LG TV (Intel(R) Display Audio)

My Ethernet card: Intel(R) Ethernet Connection I219-V

My WiFi adapter is turned off.

I, too, completely wiped my system and reloaded Windows 10 to try to get rid of this problem. It returned. The problem definitely appears as a RAPID stutter of audio, like a tiny loop, that lasts from a fraction of a second to a couple of seconds.

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For everyone, especially the new people, read this post by 'exile360' from Apr 17:'I suspect that it was the I/O, not RAM usage, that caused the sound to stutter.  The issue is likely related to DPC latency, and somewhere between your sound driver and network driver (which is where Web Protection in Malwarebytes comes into the picture) there exists an issue with interference.
And this post by 'AdvancedSetup' Staff, on Apr 15:No promise this will fix your issue but you can do the following and let us know.
Option 1: Disable Web Protection via the tray icon
Option 2: Revert to Malwarebytes 4 CU1 and disable program updates until the next beta is available
Step 1:  Uninstall and reinstall using the Malwarebytes Support Tool but do not allow the program to reinstall after the reboot. Decline the install
Step 2; Download Malwarebytes 4 CU1 and install it
Step 3: Open Malwarebytes, click the wheel image.png (top right) for Settings, General, then disable Application updates.    
Step 4: Restart the computer


Might be a good idea to just re-read the entire thread?

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For many people, the DPC tool is going to probably be a red herring. If you do a bit more research on the tool and its use and results there isn't a lot of "current" information and reports of using the tool to solve an issue. Nvidia drivers are also often the cause of poor DPC results.

 

The first step in possibly resolving the issue is to do a clean removal and reinstall of the program using our tool. For many people, this resolves the issue. For those that it does not resolve the issue then you may want to try enabling the Beta downloads from within Settings, General.

If the latest beta also does not correct the issue, then please gather logs to help us track down and resolve the issue.

 

 

STEP 1
Please do the following Uninstall and reinstall Malwarebytes using the Malwarebytes Support Tool

Please have lots of patience with the tool.  The first phase is a cleanup and does require a Windows Restart.
After the Restart, it may take 2 - 3 - 4 minutes till the Support tool screen shows up.   Please be patient and have faith.  Wait for it, whatever it takes.
The 2nd phase is where it offers to do a new Install.

 Let us know if that clears up the issue or not.

 

If STEP 1 did not help then please restart the computer and  proceed to STEP 2 so that we can get logs to help us determine the cause


STEP 2
When the issue occurs, do you have a VPN or any other network filtering software enabled (besides Malwarebytes)?
Does this issue consistently present itself when Web Protection is enabled?
Does the issue occur when you are not using Bittorent, qBittorrent, or any other P2P torrent software?

We're in need of additional information to help narrow down the cause of this issue.
Part of this process will involve manually triggering a crash to obtain a memory dump, which will hopefully show what the Web Protection driver is doing to cause this issue. You can read more about this process here.


Once you've reproduced the issue and are actively experiencing it, force a crash by pressing the following keys at the same time: Left Ctrl+Left Alt+U+U.

After the machine has rebooted, you should find a memory dump named MEMORY.dmp in C:\Windows. Please zip this up and provide it to us.

Please follow the directions from the following topic:  Upload Malwarebytes Support Tool logs offline and upload that new log as well on your next reply
 

STEP 3 (if step 1 did not help and you do not wish to participate in step 2)

 

Option 1: Disable Web Protection via the tray icon

Option 2: Revert to Malwarebytes 4 CU1 and disable program updates until the next beta is available

Step 1:  Uninstall and reinstall using the Malwarebytes Support Tool but do not allow the program to reinstall after the reboot. Decline the install
Step 2; Download Malwarebytes 4 CU1 and install it
Step 3: Open Malwarebytes, click the wheel image.png (top right) for Settings, General, then disable Application updates.     
 

image.png

Step 4: Restart the computer

 

Thank you

 

 

 

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16 hours ago, AdvancedSetup said:

For many people, the DPC tool is going to probably be a red herring.

How so? When it comes to properly handling real-time audio, ISR routine / DPCs and the time they take to execute (latency) are relevant.
AV/Anti-malware products often tie in on a low kernel/driver level, so driver issues or conflicts are not unimaginable.
A good explanation (and tool to measure) can be found at Resplendence's LatencyMon page.

It does take a bit of IT understanding and is not a cookie-cutter answer, that's true. 
LatencyMon at least uses general rules of thumb that make sense to estimate whether a system is running in a way suitable for handling real-time* audio.
Anything under 2000 µs (2ms) is considered ok. On my PC it measures 500 at the highest and 10 µs on average.

Please note the how to use page also mentions there's several other possible causes for drop-outs: audio buffer size, CPU thread contention (high load/competing programs), buggy drivers, buggy software. Also CPU throttling/power saving functions can cause spikes during state switching. 

Since the tool shows drivers' DPC execution times and processes' hard page faults they can at least help you find possible culprits of audio issues. Probably the DPC latency spikes are much bigger than 2ms if they're the cause of dropouts in normal music playback.

 

*: real-time refers to use-cases where you use low-latency (midi) devices with a small buffer... Like artists or recording studios do to obtain a low total roundtrip latency in the monitor/artist earbud. Regular music/video playback is not real-time and should be able to handle higher latencies. Buffer sizes for recording input could be e.g. 256 samples. At a sample rate of 44.1kHz that's only 5.8ms input latency (2000µs = 2ms)
Audio/video playback software often uses buffers 10x that or more. 

Edited by Propheticus
typo

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