Resolve replay stutters exactly every 5 minutes

Hallo,
I am on a new ThinkStation P3 Ultra, Windows 11 prof. and running Resolve 18.6.6 with two monitors and a reference monitor through UltraStudio 4K Mini. This setup is totally new in this configuration, so I cannot say what might be the reason for this:
For some reason (and I tried every performance enhancing method I could find, including Proxys and Optimised Media on internal SSD, and reducing Quality in timeline settings) when I start playing a sourceclip or a timeline there is a short stutter (like stopping and resuming the replay) exactly every 5 minutes. Since we have to watch many hours of footage it is really annoying.
I exported a log after my last session and attached it. I stopped noting every time the stutter happend, but I wrote down this times for the session the log refers to: 09:54 9:59 10:04 10:09

If someone has an idea what could be the reason for this I would much appreciate every help I can get.
Thank you! Barbara

I examined your logs and at the times you indicated there are errors like this:

Timeout waiting for interop lookahead (AVSyncCount = 10589)
DLFIFOThread::ScheduledFrameCompleted - Dropped frame

I think the DLFIFOThread is for the DeckLink interface.

Loosely associated with those were project auto backup messages, also lots of errors like this:
Audio ERROR: SampleFramesWritten = 1351 (numSamplesToSchedule = 2304) at device 0

The 5 min intervals could imply something related to project auto backups. As a test you could go to System Settings>Project Save & Load, and temporarily turn those off, including turning off Live Save.

Make sure you have plenty of extra disk space in the backup location.

Thank you for taking the time! I will do that to see if that changes anything. But I already set auto-safe to every 60min, because I thought it might be that. I actually hope it is not that because I wouldn't want to have to disable autosafe just to have a clean playout.

I disabled the autosafe but no change. I also have plenty of disc space. I now moved the Proxys to an external SSD. Having them on the internal drive was just to see if the reason was the drive I was working on before. I still have 500GB diskspace on my internal drive and 1,8TB on my external drive.

I have to say that the overall performance is not very good. Maybe it's the combination of hardware with Resolve 18. The hardware should be good enough (and I have the studio version of resolve) to ensure smooth replay and editing in Resolve. But it is overall not smooth. Maybe it is not possible to apply LUTs to Proxys (just rec709 on log) and have a smooth editing experience? But that's maybe a different topic. Might have nothing to do with the regular interruptions.

Which GPU do you have?

NVIDIA RTX A2000 12GB

Did you get the driver from Nvidia or was it installed by Microsoft?

I think it was preinstalled but it says it is the most recent ("best") one. Should I look for a special driver?

That’s what they always say.
Go straight to Nvidia and check which Studio driver they recommend for your card. If it’s not the one you already have, make a clean install of that one.

That's true
I did what you recommended. I now have the latest studio driver installed (it was a gaming driver before that). Sadly this also didn't solve the problem. Although Resolve seems to behave smoother now. Could be my imagination though', time will tell. Thank you in any case this was a step in the right direction even if it didn't solve this particular problem.

Would it make sence at this point to ask blackmagic customer support? Or are the same people in this forum anyway?

...this also didn't solve the problem. Although Resolve seems to behave smoother now...

If it still has the slowdown every 5 min, that could imply some regular, recurring process. E.g, Resolve auto backups (although you have excluded that via testing), or some Windows task that runs every 5 min, or anti-virus app that runs every 5 min, etc.

It might be good to run Windows Resource Monitor (ResMon) and examine what happens during that period. When it happens, that will be recorded on the ResMon graphs for about 50 sec before it scrolls off. When you experience a clear manifestation of the problem, I suggest taking screen caps of each of ResMon's five tabs: Overview, CPU, Memory, Disk, Network. Upload those.

If that doesn't work I can make a PerfMon template that will record various parameters to a log file that we can examine.

It may not be an external problem or resource constraint. We don't yet know, but ResMon is an attempt to get an overview during the behavior.

When you previously noted the exact time of several problems, then captured the Resolve logs, that was very useful. It enabled direct correspondence to specific errors in the Resolve logs. It seemed to show certain recurring errors at about 5 min intervals. We might need to try that again and see if anything has changed since you updated the GPU driver. However it really requires Resolve Support to go through those logs. They are very technical and I'm not familiar with Resolve's symbols and internal architecture.

It might be good to run Windows Resource Monitor (ResMon) and examine what happens during that period. When it happens, that will be recorded on the ResMon graphs for about 50 sec before it scrolls off. When you experience a clear manifestation of the problem, I suggest taking screen caps of each of ResMon's five tabs: Overview, CPU, Memory, Disk, Network. Upload those.

Excellent advice.

Thank you for your help. The Screenshots are attached.

And this is the new log just in case. The times were 14:24 , 14:29 and 14:34.

I apreciate all the help!

OK, I'm studying these; will take a few hrs...

Thank you so much for your time!

The Windows ResMon graphs don't show any apparent problems visible at that level. That implies it's not a limitation with CPU, network, disk I/O or memory. It also indicates it's not an external process (periodic backup, anti-virus, etc) kicking in every 5 min. That implies maybe it's best to pursue this as a Resolve issue and examine more closely the Resolve errors.

However I just realized those graphs don't capture GPU (I'm just a Mac guy just trying to help out).

You could run Task Manager (SHIFT+CTRL+ESC), then click "Performance" in the left side-bar and during the problem and get screen captures of each item, especially GPU and Video Accelerator (if it's there). It might not show anything else but due to the importance of GPU to Resolve performance it's probably worth it.

Below are some edited excerpts of your Resolve logs showing the regions covering the problem times. Each one is surrounded by a gigantic number of "Audio ERROR" messages, e.g:

Audio ERROR: SampleFramesWritten = 520 (numSamplesToSchedule = 1920) at device 0

Each instance also has the messages (for example):

Timeout waiting for interop lookahead (AVSyncCount = 1639)
DLFIFOThread::ScheduledFrameCompleted - Dropped frame

I notice you are using RED RWG_Log3G10 LUTs, which implies R3D material. I've edited lots of 8k and 6k R3D on Resolve from the V-Raptor and Komodo without any problems. However it is very compute-intensive to decode, so it might be interesting to examine if you ever have these issues when not editing R3D material.

The forum software won't let me attach an edited .TXT file with excerpts of the errors, so I'll just append that below. However those should be examined by Resolve support. I'm not familiar with the Resolve symbols or internal architecture.
=========================
Slowdowns: 14:24 , 14:29 and 14:34.

Detected System:
- OS: Windows 11 Pro (Build 22631)
- Model: LENOVO 1066
- System ID: 7355b17d-4bd3-472f-9492-ce1a7883657e
- CPU: Intel Core i9-14900, 32 threads, x86-64
- RAM: 9.8 GiB used of 63.6 GiB
- Intel GPU Driver: 31.0.101.4255
- NVIDIA GPU Driver: 555.85, supports CUDA 12.5
Detected 2 GPUs:
- "NVIDIA RTX A2000 12GB" (gpu:3b756fd5.5150080d) <- Main Display GPU
Discrete, 470 MiB used of 11.5 GiB VRAM, PCI:1:0 (x16)
Matches: CUDA, DirectX, NVAPI, NVML, OpenCL, Win32
- "Intel UHD Graphics 770" (gpu:25c2dc61.5f6737f1)
Integrated, 25.5 GiB VRAM, PCI:0:2.0
Matches: DirectX, OpenCL, Win32
Detected 2 monitors:
- "Generic PnP Monitor" <- Main Monitor
3840x2160, connected to "NVIDIA RTX A2000 12GB" (gpu:3b756fd5.5150080d)
- "Generic PnP Monitor"
2560x1440, connected to "Intel UHD Graphics 770" (gpu:25c2dc61.5f6737f1)


Loaded Shaper LUT 'RED\RWG_Log3G10_to_REC709_BT1886_with_LOW_CONTRAST_and_R_3_Soft_size_33.cube'

DpManager | ERROR | 2024-05-28 13:59:08,470 | DeckLink WriteAudioSamplesSync call has failed at device : 0

Decklink model name: 'UltraStudio 4K Mini', version: '12.9.0'

SyManager.ProjectManager | INFO | 2024-05-28 14:12:11,465 | Start saving project AUF BEWAEHRUNG
[0x00002294] | SyManager.ActionExecutor | INFO | 2024-05-28 14:12:11,466 | Database transaction is ongoing, user initiated action SmActIOCPSigInvoker is postponed
[0x00002294] | SyManager.ActionExecutor | INFO | 2024-05-28 14:12:11,466 | Database transaction is ongoing, user initiated action SmActIOCPSigInvoker is postponed

SyManager | INFO | 2024-05-28 14:23:23,521 | DRSE (52AB934187534EDF89FB925580C33D63) firmware update available (737b6186 to b13612e5)
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,056 | Audio ERROR: SampleFramesWritten = 796 (numSamplesToSchedule = 1920) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,102 | Audio ERROR: SampleFramesWritten = 2155 (numSamplesToSchedule = 2304) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,110 | Audio ERROR: SampleFramesWritten = 415 (numSamplesToSchedule = 1920) at device 0

-----------------
**** 14:24 Incident ****

(Huge 3 of "Audio Error" messages throughout logs, not just this 14:24 incident)

[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,622 | Audio ERROR: SampleFramesWritten = 520 (numSamplesToSchedule = 1920) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,658 | Audio ERROR: SampleFramesWritten = 1705 (numSamplesToSchedule = 2256) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,668 | Audio ERROR: SampleFramesWritten = 557 (numSamplesToSchedule = 1920) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,709 | Audio ERROR: SampleFramesWritten = 1911 (numSamplesToSchedule = 2352) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,719 | Audio ERROR: SampleFramesWritten = 502 (numSamplesToSchedule = 1920) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,757 | Audio ERROR: SampleFramesWritten = 1788 (numSamplesToSchedule = 2304) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,765 | Audio ERROR: SampleFramesWritten = 417 (numSamplesToSchedule = 1920) at device 0
[0x00000208] | DpManager | ERROR | 2024-05-28 14:23:29,798 | Audio ERROR: SampleFramesWritten = 1556 (numSamplesToSchedule = 2304) at device 0
[0x00005efc] | LsManager | WARN | 2024-05-28 14:24:00,760 | Timeout waiting for interop lookahead (AVSyncCount = 1639)
[0x00005efc] | LsManager | WARN | 2024-05-28 14:29:01,519 | Timeout waiting for interop lookahead (AVSyncCount = 8458)
[0x00003410] | DpManager | INFO | 2024-05-28 14:33:31,788 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame
[0x00005efc] | LsManager | WARN | 2024-05-28 14:34:02,233 | Timeout waiting for interop lookahead (AVSyncCount = 10351)

disk:Local Database:Local Database:\AUF BEWAEHRUNG:AUF BEWAEHRUNG::e8e0b772-a295-4d84-a07e-219260d956aa


SyManager | WARN | 2024-05-25 13:50:41,100 | No reply received from file system, assume successfully deleted folder C:\Users\barba\Videos\Resolve Project Backups\50ab1b06-6c8e-445f-8205-77138b157a8c.
[0x0000428c] | SyManager | WARN | 2024-05-25 13:50:41,111 | No reply received from file system, assume successfully deleted folder D:\DaVinci Resolve Media\CacheClip\50ab1b06-6c8e-445f-8205-77138b157a8c.
[0x0000428c] | SyManager | WARN | 2024-05-25 13:50:41,122 | No reply received from file system, assume successfully deleted folder D:\DaVinci Resolve Media\.gallery\50ab1b06-6c8e-445f-8205-77138b157a8c.

---------------------
**** 14:29 Incident ****

DpManager | ERROR | 2024-05-25 14:27:52,532 | Audio ERROR: SampleFramesWritten = 1186 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:27:52,544 | Audio ERROR: SampleFramesWritten = 583 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:27:52,572 | Audio ERROR: SampleFramesWritten = 1318 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:27:52,582 | Audio ERROR: SampleFramesWritten = 484 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:27:52,600 | Audio ERROR: SampleFramesWritten = 827 (numSamplesToSchedule = 1920) at device 0
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:27:57,157 | Start saving project AUF BEWAEHRUNG
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:27:57,199 | Saving project took 41 ms
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:27:58,052 | Start saving project AUF BEWAEHRUNG
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:27:58,089 | Saving project took 38 ms
[0x00003008] | DpManager | INFO | 2024-05-25 14:27:59,150 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame
[0x000042e4] | LsManager | WARN | 2024-05-25 14:28:06,378 | Timeout waiting for interop lookahead (AVSyncCount = 20227)
[0x00003008] | DpManager | INFO | 2024-05-25 14:30:28,507 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:30:30,878 | Start saving project AUF BEWAEHRUNG
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:30:30,898 | Saving project took 19 ms
[0x000067fc] | BtCommon | WARN | 2024-05-25 14:30:31,538 | Duration is negative
[0x00003008] | DpManager | INFO | 2024-05-25 14:30:39,247 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:30:47,127 | Audio ERROR: SampleFramesWritten = 1314 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:30:47,150 | Audio ERROR: SampleFramesWritten = 1089 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:30:47,165 | Audio ERROR: SampleFramesWritten = 746 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:30:47,186 | Audio ERROR: SampleFramesWritten = 970 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:30:47,196 | Audio ERROR: SampleFramesWritten = 518 (numSamplesToSchedule = 1920) at device 0
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:31:01,310 | Start saving project AUF BEWAEHRUNG
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:31:01,396 | Saving project took 87 ms
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:31:01,883 | Start saving project AUF BEWAEHRUNG
[0x000067fc] | SyManager.ProjectManager | INFO | 2024-05-25 14:31:01,899 | Saving project took 15 ms
------------------
**** 14:34 Incident ****

DpManager | ERROR | 2024-05-25 14:31:47,760 | Audio ERROR: SampleFramesWritten = 977 (numSamplesToSchedule = 2784) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:31:47,783 | Audio ERROR: SampleFramesWritten = 1114 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:31:47,817 | Audio ERROR: SampleFramesWritten = 1634 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:31:47,844 | Audio ERROR: SampleFramesWritten = 1261 (numSamplesToSchedule = 3984) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:31:47,857 | Audio ERROR: SampleFramesWritten = 655 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:31:47,866 | Audio ERROR: SampleFramesWritten = 401 (numSamplesToSchedule = 1920) at device 0
[0x00003008] | DpManager | INFO | 2024-05-25 14:31:49,286 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame
[0x000042e4] | LsManager | WARN | 2024-05-25 14:33:07,007 | Timeout waiting for interop lookahead (AVSyncCount = 27270)
[0x00003008] | DpManager | INFO | 2024-05-25 14:33:32,164 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:33:59,487 | Audio ERROR: SampleFramesWritten = 5906 (numSamplesToSchedule = 8688) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,670 | Audio ERROR: SampleFramesWritten = 2112 (numSamplesToSchedule = 2256) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,682 | Audio ERROR: SampleFramesWritten = 610 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,715 | Audio ERROR: SampleFramesWritten = 1562 (numSamplesToSchedule = 2112) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,724 | Audio ERROR: SampleFramesWritten = 459 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,767 | Audio ERROR: SampleFramesWritten = 2038 (numSamplesToSchedule = 2304) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,778 | Audio ERROR: SampleFramesWritten = 547 (numSamplesToSchedule = 1920) at device 0
[0x00005ca0] | DpManager | ERROR | 2024-05-25 14:34:18,810 | Audio ERROR: SampleFramesWritten = 1550 (numSamplesToSchedule = 2208) at device 0
...
DpManager | INFO | 2024-05-25 14:34:20,124 | DLFIFOThread::ScheduledFrameCompleted - Dropped frame

Thank you for all the troubel you went through! I will take a look at that.
I am certain it isn't the RED Material. I am editing with proxys, and also have Sony FX Material and different Codecs in the project, because we are still in an experimental stage of a documentary and are trying different cameras and setups. The only reliable thing about this whole project is that resolve stutters ervery 5 minutes, it doesn't matter what footage I am watching or editing.
I don't know if that is relevant but just in case: I am also editing with Avid Mediacomposer on the same system and this problem doesn't come up there. So you know it is not just the whole computer freezing,

What happens if you turn all audio tracks off?

Detected 2 GPUs:
- "NVIDIA RTX A2000 12GB" (gpu:3b756fd5.5150080d) <- Main Display GPU
Discrete, 470 MiB used of 11.5 GiB VRAM, PCI:1:0 (x16)
Matches: CUDA, DirectX, NVAPI, NVML, OpenCL, Win32
- "Intel UHD Graphics 770" (gpu:25c2dc61.5f6737f1)

Man, I always get nervous when I see two completely different GPUs being used together. And the integrated Intel GPUs are rarely good. I think there's not a lot of VRAM for the GPUs, and I suspect this will account (in general) for performance slowdowns.

If it were me, I'd say don't try to do complex material on a laptop like this. On a very heavy-duty laptop, sure -- you could do anything on it.

My advice would be to get a much bigger machine and export proxies with a simple baked-in color-correction just to make the images reasonable enough to work with in editing. Keep the workflow very simple so the laptop won't be bogged-down. Make the proxies very lightweight, like HD DNxHR SQX or something like that, and don't try to color-correct or use LUTs or anything else at this point. Just find your selects, build the sequences, cut the scenes together, and then once it's locked... export an XML (or a DRP) and rebuild the entire project on a much more powerful system using the original camera files again.

I disabled the autosafe but no change.

You have disabled live save but have you disabled project backups and timeline backups too? Or you haven't?

If it were me, I'd say don't try to do complex material on a laptop like this. On a very heavy-duty laptop, sure -- you could do anything on it.

My advice would be to get a much bigger machine...

I thought he was using a ThinkStation: https://www.lenovo.com/us/en/p/workstat ... en102s0014


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Hallo, everyone. How do you guys do the quotes? I will just answer in chronological order:
@Joe: I wrote to BM Support, but that will probably take a while
@Uli: Thank you for the suggestion. I tried with muted audio and no audio on the tracks at all. Sadly still the same problem.
@Marc: The GPU has 12GB VRAM and should be good enough for editing intraframe proxys in my experience. If the combination of the two GPUs in the Think Station is the problem I hope BM support can tell me (and I hope not)
@Alexander: I disabled every autosafe option including project and timeline backups when I followed that suggestion. It is now set to every 60minutes.
@Ben: Yes, that's the one. The one with the 12GB GPU and 64GB RAM

Thanks, Barbara

@Alexander: I disabled every autosafe option including project and timeline backups when I followed that suggestion. It is now set to every 60minutes.

Got it. Whatever it is if it is happening at exact intervals without missing a beat it has symptoms of timer based process, if not within Resolve then outside it. It doesn't have to be a backup process, it can be a sync one that very briefly "locks" file system. Such thing often doesn't stand out in resource monitoring as it has no CPU / memory / I/O yet it interferes with smooth behavior. So while others are looking through logs I encourage you to look at all things at your system and ask yourself which ones of them might be having timer based activity.

Do you run a mail program on your machine? I use Thunderbird and have it set to check mail from server every 10 mins. Do you have something that checks things like that. Backup program like Acronis etc.

My editing machines have nothing but editing software on them not even virus checking separate from OS.

An interesting experiment would be to play the video, wait for the first stutter, then once it's happened pause the video for, say, 1 minute and start it up again. If the next stutter occurs 5 minutes later by the wall clock then you know it's not related to the video itself. But if it occurs 5 minutes later on the video clip then there's something about the video itself that's causing the problem.

Hi, thank you for the suggestions. I am a little behind in trying stuff, but wanted to answer a few things real quick: It doesn't matter if I pause the video and start playing it or something else again. the problem resumes in 5 min intervals. BUT it is not always at the same time. So one day it could be at 14:23 and the next at 14:26. So it either depends on when I start my system or when I start resolve (Trying to find that out now).
I am still looking for processes that might be the cause other than resolve. I don't have the habit in having a lot of background stuff running. I don't have an extra virus scanner other than the one included in windows.
It is a new machine and I have mostly editing related software on it but I also have steam and a few games installed (that I didn't come around to start yet).
I cannot find an option for firefox scanning the server in intervals. The mails appear instantly when they are received at the server. So I don't know if I just overlooked something or something has changed in that regard. I will just not run firefox for the next tests.

Thank's to all for the help!

I did a few more tests: It seems like the stutter timer starts running when I start resolve. I tried different starting times of the computer, Resolve, and opening the project. The stutter always starts 5min after starting resolve.

I did a few more tests: It seems like the stutter timer starts running when I start resolve. I tried different starting times of the computer, Resolve, and opening the project. The stutter always starts 5min after starting resolve.

I am studying some ways to get more detailed data. I need to test a few things....

Hey Joe,
I looked at the Taskmanager Readings and there was nothing to see on any of the possible readings when the stutters occur. I especially looked at the GPUs but also the rest didn't spike anything that I saw.
And I also changed my main output from Desktop Video to the internal speakers and unplugged my Ultrastudio 4K mini, because I thought that may be the problem. But it also didn't change anything.

Those were all good things to check and do. I'll try to have some more suggestions and test procedures later today, but I need to verify them first.

I looked at the Taskmanager Readings and there was nothing to see on any of the possible readings when the stutters occur. I especially looked at the GPUs but also the rest didn't spike anything that I saw.

Don't forget to watch disk read+write I/O sorted from largest to smallest and note which process is at the top when it happens.

I looked at the Taskmanager Readings and there was nothing to see on any of the possible readings when the stutters occur. I especially looked at the GPUs but also the rest didn't spike anything that I saw.

Don't forget to watch disk read+write I/O sorted from largest to smallest and note which process is at the top when it happens.

I/O is a key thing to watch, esp. for a recurring 5 min problem. However I don't think that's it because she already ran Resource Monitor, which shows disk queue length, and it was very low. That is global, over all processes. Normally if queue length is low, you don't have an I/O bottleneck. However I will double-check by creating a PerfMon template or a Windows Performance Analyzer template that logs data we can then analyze.

I looked at the Taskmanager Readings and there was nothing to see on any of the possible readings when the stutters occur. I especially looked at the GPUs but also the rest didn't spike anything that I saw.

Don't forget to watch disk read+write I/O sorted from largest to smallest and note which process is at the top when it happens. However I will double-check by creating a PerfMon template or a Windows Performance Analyzer template that logs data we can then analyze.

I/O is a key thing to watch, esp. for a recurring 5 min problem. However I don't think that's it because she already ran Resource Monitor, which shows disk queue length, and it was very low. That is global, over all processes. Normally if queue length is low, you don't have an I/O bottleneck.

Correct. However, sometimes when process _briefly interferes_ with I/O it won't be seen by naked eye in disk queue (especially when disk is fast enough to clear queue in between Task Manager's refreshes) but might be felt as stutter and caught by naked eye by watching are there processes that briefly jump to top of I/O list. Catching those is much easier with PerfMon, like you plan to do, especially with PerfMon allowing to pick gathering granularity.

Crazy thought— do you have vsync enabled on your monitor(s)?


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administration events custom view.jpg (531.31 KiB) Viewed 429 times

how to get to event log via control panel.jpg (358.1 KiB) Viewed 429 times

maybe event log ( administration custom view) which shows warnings can help
I'm on win10. I type in search 'control panel' and eventually get where I want. It used to be easier in earlier O.S. versions.

On bottom of one of these images you can see link to events. ( administrative tools ).

If you see 5 min warnings see what it says and then google that event description.