18.6.4 Studio crashing with a7SIII's h.265 4K 10bits 4:2:0

Davinci Resolve Studio 18.6.3 (updated and with the same problem since 18.3) constantly crashes on Windows 11 (every 10-15 minutes) working with 4K h.265 10bits 4:2:0 from Sony a7SIII without processor or graphics overhead (i5-13600K that decodes this specific code + RTX4070 + 64Gb 6000Mhz CL32 + 970 EVO Pro SSD specific for cache, none of these components usually pass while I edit at 50% of their capabilities).

I can't find related information, I've been working with h.265 for a while but I could swear that the problem comes from a recent Windows, Davinci or Nvidia update. The program does not give any errors when it closes. I have been able to see a few other users on Reddit with similar problems on computer configurations almost identical to mine with this same codec.

Attached NSO, System Info and one Resolve diagnosis log from the next opening after a crash.

UPDATE: With my 64Gb DDR5 RAM configuration I decided a long time ago to remove the Windows paging file, apparently this made everything more stable, from Davinci Resolve, to games, Photoshop, Lightroom, etc. Today by chance I noticed that the paging file existed again, probably as a result of a Windows update, I deleted it again and I have been working with Resolve Studio for two hours without problems, perhaps this is not the reason but I will keep you updated.

UPDATE 2: Same problems without the pagination file.

UPDATE 3: I still have the same problems, I have had the task manager overlaid, in fact nothing is overloaded, neither the CPU, nor the GPU nor the RAM exceeded 40% of its capacity. I am attaching a new diagnostic record without a pagniation file. NEW RESOLVE LOG file generated, 341Mb ZIP: https://drive.google.com/file/d/1Nm3oxEpiV6HdYLyUjXGZWRdUXoWvpLFc/view?usp=drive_link

UPDATE 4: I have been able to observe that the crash is observed most of the time when moving clips, cutting, or mainly when expanding or reducing the timeline. I know that this constantly rewrites the thumbnails, perhaps the problem comes from there, but I still don't see any overload on my computer's performance.

UPDATE 5: I have observed that when scrolling through the timeline, zooming in or out, such as moving files, the CPU often reaches 100% of its capacity at certain times, something that should not happen. When this happens, that is when the program sometimes crashes. I have checked voltages, my power supply is 650W but I am always far from reaching its maximum. This seems to be directly related to creating thumbnails.

UPDATE 6: Digging into the system information and reliability data I have observed that just before Davinci Resolve Studio crashes, Inter Arc Control Assist stops working. By disabling Intel Quick Sync for the hardware decoding of my codec, the program seems stable, I have edited three hours with it without errors, but I should be able to use this function without problems.

I found a forum (https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=188218) related to this problem and I followed the steps indicated to reach the same scenario as this user:

"Hi, thank you for looking into this problem.

I rolled back Intel driver to 30.0.101.1029 [11/3/2021]. A driver from no Intel ARC GPU era.
I'm still getting the same memory leak problem. With Davinci resolve, Intel iGPU memory usage can not go pass 27.5GB on my 12900H laptop with 64GB of ram. Intel iGPU can use up to maximum 32GB.
What I did notice from version 18.5 is that when it is about to crash due to the Intel iGPU quicksync memory leak. Davinci resolve 18.5 and newer will automaticly save the project before quitting without any warning tabs/notifications.

The current workaround is disabling the thumbnail generation. System with 32GB RAM or less will crash much faster due to smaller iGPU RAM pool.

When enabling hardware Intel quicksync to decode H.265 4:2:2 10bit files, I do not get the same iGPU thumbnail memory overload problem with the latest premiere pro."

I can't strictly determine that the problem is with Intel with their Arc Control Assist, but for now it appears to be that way.

UPDATE 6: Dwaine Maggart told me via DM that Resolve needs the paging file, I created it according to his instructions (minimum size 1.5 times RAM, maximum size 3 times RAM). After verifying that Resolve Studio is stable without Intel Quick Sync, I activate it again along with the paging file and I prepare to work for a few hours, I will update the post with the results.

If Intel Arc Control Assist crashes again and then Davinci, the problem will point to this driver or a Resolve bug with the driver as indicated at viewtopic.php?f=21&t=188218

UPDATE 7: After creating the paging file correctly I have worked 10 hours with heavy workload without problems, until a new failure, this time Intel Arc Control is no longer in the equation according to reliability monitor, I have monitored a peak of the GPU and the processor to 100% when moving a clip without further involvement. I don't know if this may have to do with all the previous problems, but let's review it with the new attachments and clear up any doubts.

New System Info, new DxDiag (both monitors appears under RTX, not iGPU) and new Resolve Diagnosis from the crash: https://drive.google.com/drive/folders/1mQFvZLJm33kUli9ARgSBjARrvvN34iBs?usp=sharing

UPDATE 8: Two new crashes only moving clips in the timeline without no previous Intel Arc Control Crash, no GPU or CPU peaks detected. Two new Resolve Diagnosis Logs uploaded here (2. and 3.): https://drive.google.com/drive/u/1/folders/1mQFvZLJm33kUli9ARgSBjARrvvN34iBs

[Peter Chamberlain]

Please review the FAQs regarding capture and posting of Resolve generated logos, your NFO and how to post them.

Resolve 18.6.4 is available now? I didn't see an announcement on the forum

Resolve 18.6.4 is available now? I didn't see an announcement on the forum

18.6.3, sorry for the mistake.

Davinci Resolve Studio 18.6.3 (updated and with the same problem since 18.3) constantly crashes on Windows 11 (every 10-15 minutes) working with 4K h.265 10bits 4:2:0 from Sony a7SIII without processor or graphics overhead (i5-13600K that decodes this specific code + RTX4070 + 64Gb 6000Mhz CL32 + 970 EVO Pro SSD specific for cache, none of these components usually pass while I edit at 50% of their capabilities).

I can't find related information, I've been working with h.265 for a while but I could swear that the problem comes from a recent Windows, Davinci or Nvidia update. The program does not give any errors when it closes. I have been able to see a few other users on Reddit with similar problems on computer configurations almost identical to mine with this same codec.

Attached NSO, System Info and one Resolve diagnosis log from the next opening after a crash.

UPDATE: With my 64Gb DDR5 RAM configuration I decided a long time ago to remove the Windows paging file, apparently this made everything more stable, from Davinci Resolve, to games, Photoshop, Lightroom, etc. Today by chance I noticed that the paging file existed again, probably as a result of a Windows update, I deleted it again and I have been working with Resolve Studio for two hours without problems, perhaps this is not the reason but I will keep you updated.

The question is, can the paging file create these problems? Do you have a history of this situation?

Please review the FAQs regarding capture and posting of Resolve generated logos, your NFO and how to post them.

Solved and updated.

paging file was created and managed by Windows

I think that is the best possible option here. I would not expect having it to cause any issues. Rather the opposite. Using any other settings are frequently the cause of issues.

paging file was created and managed by Windows

I think that is the best possible option here. I would not expect having it to cause any issues. Rather the opposite. Using any other settings are frequently the cause of issues.

UPDATE 3: I still have the same problems, I have had the task manager overlaid, in fact nothing is overloaded, neither the CPU, nor the GPU nor the RAM exceeded 40% of its capacity. I am attaching a new diagnostic record without a pagniation file. NEW RESOLVE LOG file generated, 341Mb ZIP: https://drive.google.com/file/d/1Nm3oxE ... drive_link

paging file was created and managed by Windows

I think that is the best possible option here. I would not expect having it to cause any issues. Rather the opposite. Using any other settings are frequently the cause of issues.

UPDATE 4: I have been able to observe that the crash is observed most of the time when moving clips, cutting, or mainly when expanding or reducing the timeline. I know that this constantly rewrites the thumbnails, perhaps the problem comes from there, but I still don't see any overload on my computer's performance.

Hi Pablo,

Does the problem still persist for you? I still had the same issue with 18.6.3, yet to give 18.6.4 and the latest ark drivers a go to see if it's fixed. Did the page file generation work or resolve most of the bigger crashes? Can you maybe share and elaborate how you created the correct pagefile in order to be able to work 10 hours straight?

Hopefully this will also help me and maybe others! Thanks in advance!

Hi to all with this memory overload problem.
Make sure to update intel driver. Newer driver will release memory faster than the 2021 version.
But will still crash with moderatly complex timelines with thumbnail enabled.

My lastest workaround is to limit Davinci Resolve to use only 16GB of RAM on my 64GB system. Any higher RAM allocation setting will result in eventual memory overload.

Intel iGPU can use up to half of the total system memory (laptop version can only use up to 32GB, desktop can use up to 64GB).

***"Since intel iGPU can easily use up to 32GB for thumbnail generation. So by limiting DR to 16GB, and Windows11 will use up to 12~16GB. Thats pretty much using up all the 64GB of system memory in my system. Now, no more memory overload/overlapping crashes!"***

Can Blackmagic prevent DR's memory poll from overlapping with the intel igpu sharded memory/RAM?

A system with 128GB of RAM should greatly reduce this problem if you require at least 32GB of RAM for DR.

The best way to avoid this is a separate GPU with enough VRAM.

Go into your bios and trying limiting how much memory is available to the IGPU. See if that helps.

But I'm not sure if you're saying is the problem the IGPU wanting more memory or Resolve.

The best way to avoid this is a separate GPU with enough VRAM.

Sadly, Intel Quicksync is the fastest and the only h265 10bit 422 hardware decoder on pc platform.

Go into your bios and trying limiting how much memory is available to the IGPU. See if that helps.

But I'm not sure if you're saying is the problem the IGPU wanting more memory or Resolve.

My laptop do not allow me to alter the iGPU RAM limit.

iGPU uses shared windows memory (total system RAM)
Windows 11 will use up to 11~16GB of system RAM when I start up my laptop. If I allow DR to use 32GB of RAM. Intel iGPU will only have 16GB of sharded system RAM free to cashe the video thumbnails. However Intel iGPU will still try to use up to 29GB of memory on my system even though only 16GB are actaully free. Allowing DR to use 25GB will crash, 20GB will crash, 16GB rarely crash.
Which I assume the crashes were due to overuse of the sharded system RAM.

Blackmagic might able to limit the Intel iGPU max sharded memory usage for users desire for more Locked system RAM pool for Davinci Resolve projects that require more system RAM and less iGPU RAM.

My wife is working with such files out of a Sony A7 IV without issues on a MacBook with only 16 GB.
It’s impossible that a PC with 64 GB has such massive problems. There must be something else causing the this, probably your main GPU is not recognized, or could it be overheating?
There’s a free tool to observe what your GPU is doing, called GPU-Z. Generally, any PC laptop other than a massive gaming model is not good for UHD in DR.

My newest observation of this intel IGPU memory overload issue will only happen when using an external display with my laptop. (Limit Davinci to 16GB and do not use any other extra memory-intensive programs in the background can prevent memory overlapping overloading issue.)
Intel iGPU is able to release memory much faster when editing with laptop's own display and no need to limit Davinci to 16GB).

From my research, an external GPU will have reduced performance when the user needs to display external GPU-rendered content on the laptop's built-in monitor.

Davinci Resolve Studio 18.6.3 (updated and with the same problem since 18.3) constantly crashes on Windows 11 (every 10-15 minutes) working with 4K h.265 10bits 4:2:0 from Sony a7SIII ...

Few questions:

1. Can you share copy of your source media and project that results in crashes?

2. Does it always crash when you do same thing? If yes what is the action that most often triggers the crash?

3. Does it crash when you try to use H265 10-bit 4:2:2 / 8-bit 4:2:2 / 8-bit 4:2:0? What about H264 variations?

4. Last but not least have you cleaned up your video card drivers using DDU and then tested stability of your system (CPU, memory, GPU) using OCCT?

My newest observation of this intel IGPU memory overload issue will only happen when using an external display with my laptop. (Limit Davinci to 16GB and do not use any other extra memory-intensive programs in the background can prevent memory overlapping overloading issue.)
Intel iGPU is able to release memory much faster when editing with laptop's own display and no need to limit Davinci to 16GB).

From my research, an external GPU will have reduced performance when the user needs to display external GPU-rendered content on the laptop's built-in monitor.

Thank you Blackmagic team, this memory overload problem is no longer an issue with version 19!!! No workaround needed! But still needed to make sure not be running intel 2021 igpu driver, which my windows11 laptop kept installing old intel 2021 igpu driver every few weeks...