Lens Blur not working in LrC and Disables option to use Graphics Processor

[jm345ps]

Initially the option in /preferences/performance/Use Graphics Processor is set to Auto.

Working with Develop Module on images works Ok with the exception of Lens Blur

When I try using Lens Blur, I get this error message:

LrC disables the option /preferences/performance/Use Graphics Processor which then slows all the other LrC processing, especially in Develop Module.

My System Info BEFORE using Lens Blur is as follows:

Lightroom Classic version: 13.1 [ 202312111226-41a494e8 ]

License: Creative Cloud

Language setting: en

Operating system: Windows 11 - Home Premium Edition

Version: 11.0.22631

Application architecture: x64

System architecture: x64

Logical processor count: 8

Processor speed: 2.3GHz

SqLite Version: 3.36.0

CPU Utilisation: 2.0%

Built-in memory: 16133.8 MB

Dedicated GPU memory used by Lightroom: 217.4MB / 1982.4MB (10%)

Real memory available to Lightroom: 16133.8 MB

Real memory used by Lightroom: 942.9 MB (5.8%)

Virtual memory used by Lightroom: 1262.1 MB

GDI objects count: 852

USER objects count: 2701

Process handles count: 2423

Memory cache size: 3.1MB

Internal Camera Raw version: 16.1 [ 1728 ]

Maximum thread count used by Camera Raw: 5

Camera Raw SIMD optimization: SSE2,AVX,AVX2

Camera Raw virtual memory: 62MB / 8066MB (0%)

Camera Raw real memory: 68MB / 16133MB (0%)

System DPI setting: 120 DPI

Desktop composition enabled: Yes

Standard Preview Size: 1440 pixels

Displays: 1) 1920x1080

Input types: Multitouch: Yes, Integrated touch: Yes, Integrated pen: No, External touch: No, External pen: No, Keyboard: Yes

Graphics Processor Info:

DirectX: NVIDIA GeForce MX250 (31.0.15.4633)

Init State: GPU for Image Processing supported by default

User Preference: Auto

This is my System Information showing my Graphics Processor Info AFTER trying to use Lens Blur:

Lightroom Classic version: 13.1 [ 202312111226-41a494e8 ]

License: Creative Cloud

Language setting: en

Operating system: Windows 11 - Home Premium Edition

Version: 11.0.22631

Application architecture: x64

System architecture: x64

Logical processor count: 8

Processor speed: 2.3GHz

SqLite Version: 3.36.0

CPU Utilisation: 6.0%

Built-in memory: 16133.8 MB

Dedicated GPU memory used by Lightroom: 2395.9MB / 1982.4MB (120%)

Real memory available to Lightroom: 16133.8 MB

Real memory used by Lightroom: 3512.7 MB (21.7%)

Virtual memory used by Lightroom: 3976.7 MB

GDI objects count: 956

USER objects count: 2692

Process handles count: 2499

Memory cache size: 3.1MB

Internal Camera Raw version: 16.1 [ 1728 ]

Maximum thread count used by Camera Raw: 5

Camera Raw SIMD optimization: SSE2,AVX,AVX2

Camera Raw virtual memory: 72MB / 8066MB (0%)

Camera Raw real memory: 83MB / 16133MB (0%)

System DPI setting: 120 DPI

Desktop composition enabled: Yes

Standard Preview Size: 1440 pixels

Displays: 1) 1920x1080

Input types: Multitouch: Yes, Integrated touch: Yes, Integrated pen: No, External touch: No, External pen: No, Keyboard: Yes

Graphics Processor Info:

DirectX: NVIDIA GeForce MX250 (31.0.15.4633)

Init State: GPU disconnected

User Preference: Auto

My catalog is on a SSD with 31 % Free space

My Camera RAW CACHE is set for 20 GB. it is on drive C

As you can see my GPU drive is v546.33 and per NVIDIA that is the latest as of 1 January 2024. I have only 2GB of VRAM

My Camera is a Sony A7R5 which has 60 MB RAW files.

Inquiry. Why is Lens Blur not working and why does LrC disable the use of the Graphics Processor when trying to Lens Blur? Is there another discussion or perhaps a Bug posting on this. Is there an ADOBE document on this. Help.

[johnrellis]

The "Something went wrong" error occurs when LR gets an unexpected result from the GPU and usually indicates it's tripping over a bug in the graphics driver. LR disables the use of the GPU to prevent the error from recurring.

"Dedicated GPU memory used by Lightroom: 217.4MB / 1982.4MB (10%)"

"DirectX: NVIDIA GeForce MX250 (31.0.15.4633)"

You've got the minimum amount of graphics memory specified in the LR system requirements:

https://helpx.adobe.com/lightroom-classic/system-requirements.html 

It may be that Lens Blur needs more than that.

Alternatively, there may indeed be a bug in the 546.33 Studio driver (just because it's "the latest" doesn't mean it's bug-free on all GPUs).  Infrequently, people have reported that installing older Studio drivers (e.g. 3, 6, or 9 months old) avoids such problems:

https://www.nvidia.com/Download/Find.aspx?lang=en-us 

[jm345ps]

Thanks for the reply. Curious, are there other LrC functions that will not work with the Minimum GPU Requirements? 

Being Lens Blur is Early Release maybe Adobe can tweak it to work with the Minimum GPU Requirements, if that is the issue.

Unfortunately I do not see a Studio Driver for the GeForce MX250, only Game Ready drivers. I suppose I could try rolling back to the previous Game Ready driver to see if that makes a difference. 

It would great if Adobe can identity the cause of the problem and let us know if there is a likely solution. Thanks

[johnrellis]

People masking was well-known to have problems with less than the minimum about of graphics memory with Intel GPUs on older Mac laptops, which was the original spur for Adobe to publish that requirement. Based on years of reports here, I think the requirement is "soft" in that whether a problem occurs depends heavily on the GPU, the driver, the version of LR / Camera Raw, and the image.

Regarding drivers, I looked into the difference between Nvidia Studio and Game Ready drivers last year. It appears that there's a single sequence of driver versions. Game Ready versions are released frequently, several times a month on average. Once a month Nvidia claims to do extra testing with the latest version on some GPUs with some creative apps, and that version gets released as both a Studio and a Game Ready driver. So you could look at the older Studio drivers for a more recent GPU, write down the version numbers of a few, and then verify that you can download that same driver for the MX250 (which will show as a "Game Ready" driver).

[jm345ps]

I tried the previous Game Ready driver but had the same error message using Lens Blur in LrC.

This is the current Game Ready driver for the MX250 (which is installed):

546.33-notebook-win10-win11-64bit-international-dch-whql.exe    Size:  685,455

There were no Studio Drivers for the MX series but I did find two drivers for the GeForce RTX490:

The Game Ready driver for the RTX490 is the same file name, date and size as the MX250 above.

And this is the Studio Driver for the RTX490:

546.33-notebook-win10-win11-64bit-international-nsd-dch-whql.exe   Size:  685,413

So you are suggesting the 546.33 Studio driver for the RTX490 will work with my MX250? Thanks

[johnrellis]

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Just use the version numbers to figure out which Game Ready driver for the MX250 corresponds to the version numbers of Studio Drivers for other GPUs:

https://www.nvidia.com/Download/Find.aspx?lang=en-us

For example, the RTX 3060 Laptop GPU has Studio Driver 531.41, from March 21, 2023. The MX250 has Game Ready Driver 531.41 from March 23, 2023. That indicates that Nvidia blessed 531.41 as a Studio Driver for those GPUs for which it does Studio-Driver testing.  So 531.41 for the MX250 could have some of the benefit of that extra testing, even though Nvidia didn't actually do that extra testing with the MX250 (the drivers have lots of code shared among the various models of GPU).

So download 531.41 for the MX250 (March 23, 2023) and try that.

And maybe try 536.99 (August 8) and 546.01 (October 31) for the MX250, also designated as Studio Drivers for the RTX 3060 Laptop GPU.

[jm345ps]

I tried unsuccessfully to install several of the GeForce Studio drivers but when they checked for compatibility my laptop's hardware (presumably the MX250) was reported as incompatible and the installation process ended. So unless we hear different from Adobe it appears my Dell computer with the Nvidia GeForce MX250 will not work with Lens Blur unless Adobe can tweak the GPU requirements of Lens Blur. Thanks.

[johnrellis]

You need to download Game Ready drivers from the MX250 download page, not from the download page for another GPU. Here are the MX250 links for the version numbers I suggested trying:

531.41: https://www.nvidia.com/download/driverResults.aspx/200383/en-us/

536.99: https://www.nvidia.com/download/driverResults.aspx/210518/en-us/

546.01: https://www.nvidia.com/download/driverResults.aspx/216300/en-us/

[jm345ps]

I installed 546.01. I was able to run Lens Blur once on a very low resolution photo. Haven't had any success since even with exiting and restarting LrC. Seems the GeForce MX250 GPU can not handle the current version of Lens Blur. Maybe Adobe can make Lens Blur more GPU efficient in future versions? Thanks