Subject mask not selecting subject

[Libby Caamaño]

Hi, I am having probelms with subject selection in Lightroom Classic 11.5. This is a recent issue and I had succesfully used subject selection and achieved a perfect mask, a week later (no update in between) I am unable to select the subject in the same photo. Subject selection seems unable to locate the subject in any other image. I've attached two images, image 1 with the previous perfect selection and image 2 with the new, far from perfect selection as part of the background and foreground has been included in the selection. I'm running the latest update of Lightroom Classic on a Mac Studio Ultra with Monterey 12.6. Any help would be appreciated!

[John R Ellis]

Please upload a sample problem image to Dropbox, Google Drive, or similar and post the sharing link here. We can see if the issue occurs on other configurations or just yours, narrowing down the problem and pointing towards a possible workaround.

[Libby Caamaño]

Hello... Thank you for your reply.  This is definitley not related to a specific image. The same issue occures on all images throughout my catlaogue  and I have now tried subject selection on the images that I posted alongside others, on a pre M1 macbook and there are no issues, a perfect selection. If there are any work arounds, I'd love to learn about them... Thank you.

[champagne_super_photo]

Exactly describes my issue that's appeared in last 2 days (aside from I'm on Windows 11), following an update of my graphics card to latest version (Radeon RX 6600).

Never seen this issue previously, but something is definitely wrong with my subject and sky auto selection.

[champagne_super_photo]

Might add that I've tried disabling GPU in preferences, and re-installed Ligtroom 11.5. Same issue remains (all images)

[John R Ellis]

@Libby Caamaño and @champagne_super_photo, please do the menu command Help > System Info and copy/paste the entire contents here. That will show us your exact hardware and software configurations and potentially help Adobe troubleshoot the issue.

@champagne_super_photo, since you're on Windows, you could try rolling back to a previous version of the driver (e.g. one that's three months old).  LR pushes the limits on using the graphics processor for executing the AI models behind Select Subject/Sky and is often tripping over driver bugs. A few people have reported here that rolling back to a previous (working) driver was successful.

[champagne_super_photo]

Lightroom Classic version: 11.5 [ 202208080927-8a575c91 ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Home Premium Edition
Version: 10.0.22621
Application architecture: x64
System architecture: x64
Logical processor count: 12
Processor speed: 3.7GHz
SqLite Version: 3.36.0
Built-in memory: 32694.0 MB
Real memory available to Lightroom: 32694.0 MB
Real memory used by Lightroom: 5010.7 MB (15.3%)
Virtual memory used by Lightroom: 12675.2 MB
GDI objects count: 1076
USER objects count: 3027
Process handles count: 3571
Memory cache size: 0.0MB
Internal Camera Raw version: 14.5 [ 1177 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 3468MB / 16347MB (21%)
Camera Raw real memory: 3550MB / 32694MB (10%)
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 3440x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info:
DirectX: AMD Radeon RX 6600 (31.0.12026.3)

Init State: 1
User Preference: 1

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic
Library Path: C:\Users\david\Pictures\Lightroom\Lightroom Catalog.lrcat
Settings Folder: C:\Users\david\AppData\Roaming\Adobe\Lightroom

Installed Plugins:
1) AdobeStock
2) Facebook
3) Flickr
4) Nikon Tether Plugin

Config.lua flags: None

Adapter #1: Vendor : 1002
Device : 73ff
Subsystem : 2413148c
Revision : c7
Video Memory : 8147
Adapter #2: Vendor : 1414
Device : 8c
Subsystem : 0
Revision : 0
Video Memory : 0
AudioDeviceIOBlockSize: 1024
AudioDeviceName: $$$/dvaaudiodevice/SystemDefaultAndEffectiveDeviceName=System Default - Speakers (High Definition Audio Device)#{comment}DVAAU-4201250: Open the audio hardware preferences page.
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 48000
Build: LR5x19
Direct2DEnabled: false
GL_ACCUM_ALPHA_BITS: 8
GL_ACCUM_BLUE_BITS: 8
GL_ACCUM_GREEN_BITS: 8
GL_ACCUM_RED_BITS: 8
GL_ALPHA_BITS: 8
GL_BLUE_BITS: 8
GL_DEPTH_BITS: 32
GL_GREEN_BITS: 8
GL_MAX_3D_TEXTURE_SIZE: 8192
GL_MAX_TEXTURE_SIZE: 16384
GL_MAX_TEXTURE_UNITS: 8
GL_MAX_VIEWPORT_DIMS: 16384,16384
GL_RED_BITS: 8
GL_RENDERER: AMD Radeon RX 6600
GL_SHADING_LANGUAGE_VERSION: 4.60
GL_STENCIL_BITS: 8
GL_VENDOR: ATI Technologies Inc.
GL_VERSION: 4.6.0 Compatibility Profile Context .220823
GPUDeviceEnabled: false
OGLEnabled: true
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[champagne_super_photo]

Rolled back the driver and it's working again now (although it's rolled me back to the MS basic display adapter from 2006?).

Just reminds me what a phenomenal job LR does of auto selecting those areas! Definitely miss it when it's not working

[John R Ellis]

"Rolled back the driver and it's working again now"

Excellent.  Please post the Help > System Info so that others can see the exact hardware and software configuration, in case the issue strikes them.

[John R Ellis]

"I've tried disabling GPU in preferences"

Unfortunately, Select Subject/Sky doesn't obey the setting of Preferences > Performance > Use Graphics processor, though it should.

[champagne_super_photo]

Managed to get the previous AMD driver installed again now and can confirm that it works fine for subject/sky selection, and the latest AMD update doesn't work (RX 6000 series).

Sorry I did post the system info previously, but maybe rejected as too long for a post? Have attached txt file now.

Thanks for your help!