Images blurry when moving slider to edit in Lightroom

[lukem89830369]

I have an issue that just started - it happens when I edit photos in Lightroom - when I move the slider, the image gets blurry and then when I let it go, it goes back to being sharp.  If I zoom into the image a little, the problem doesn't happen.  It is driving me insane. Please see attached video of the issue.  I am using Mac Book Pro M1 and Lightroom Classic 14.2 and have been using it for last 3 years.  This issue just started and I am not sure what caused it.  I was reasing about the Graphics processor but mine is turned off.  Anyone has any idea how to fix this?  Thank you.

[GoldingD]

Watching your video I see contrast changes, I see brightness changes, I do not see focus changes.

P.S. not your described issue, but in your screenshot of LrC /Preferences/Performance/ you have the default value of 5 GB fir the amount to allow the Camera RAW CACHE to occur as a max. Even Adobe states that 5 GB is too small and to increase it to at least 20 GB. (why they do not change the default is a mystery). This WILL effect Develop Module performance ( it will not effect Library Module performance). And the larger your originals are and more pointedly the larger your editing workflow is (number of photos to edit during a session) the worse it will get.

• https://helpx.adobe.com/lightroom-classic/kb/optimize-performance-lightroom.html

Additional observation,

Mac Book Pro M1 

perhaps a MACOS member can assist/comment

Why does your GPU not show up in LrC /Preferences/Performance/ even when use of the GPU is turned off? And are you having additional issues if you turn that on?

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post. Also large amounts of text in a post also render the Translate function inoperable.

[lukem89830369]

Thank you - if you watch the photo while I move the slifer, it gets blurry nd when I let it go, it goes back to being sharp.  I increased the RAW CACHE to 20GB but that did not resolve the issue.  As for GPU, it won't let me turn it on, the option is grayed out.

Here is the information you requested:

Lightroom Classic version: 14.2 [ 202502071718-3869eef7 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 15
Version: 15.3.2 [24D81]
Application architecture: arm64
Logical processor count: 8
Processor speed: NA
SqLite Version: 3.36.0
Power Source: Plugged In, 100%
Built-in memory: 16,384.0 MB
Dedicated GPU memory used by Lightroom: 0.0MB / 0.0MB (0%)
Real memory available to Lightroom: 16,384.0 MB
Real memory used by Lightroom: 2,157.0 MB (13.1%)
Virtual memory used by Lightroom: 409,344.3 MB
Memory cache size: 36.9MB
Internal Camera Raw version: 17.2 [ 2155 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 326MB / 8191MB (3%)
Camera Raw real memory: 581MB / 16384MB (3%)

Cache1:
Final1- RAM:320.0MB, VRAM:0.0MB, North Douglas Aurora24.CR3
NT- RAM:320.0MB, VRAM:0.0MB, Combined:320.0MB

Cache2:
m:36.9MB, n:188.5MB

U-main: 91.0MB

Standard Preview Size: 2048 pixels
Displays: 1) 2048x1152

Graphics Processor Info:

Init State: GPU Unsupported
User Preference: Auto
Enable HDR in Library: OFF

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/lxxxxxxxxx/Desktop/Photography/Lightroom Backup/2024-10-31 1218/Lightroom Catalog-2-v12-v13-v13-3/Lightroom Catalog-2-v12-v13-v13-3.lrcat
Settings Folder: /Users/lxxxxxxxxx/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) LRT Export 6
5) Topaz Photo AI

Config.lua flags:

[Ian Lyons · Accepted solution]

Your System Info is indicating that the GPU has been disabled. This is due to a GPU support/functionality check automatically carried out each time LrC is launched. 

The usual fix is to delete the file named 'Camera Raw GPU Config.txt'. This will force LrC to reinitialise its GPU.  Follow steps 2-5 in below linked Adobe Help document: 

https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html#solution-3

[lukem89830369]

This fixed the issue, thank you so much.

[GoldingD]

Graphics Processor Info:
Init State: GPU Unsupported
User Preference: Auto

May need a MACOS using member to comment. I would think that the M1 in your MAC would work. Apparently a GPU hardware, or GPU driver, or a LrC setup issue. Some MACOS issues involving the GPU driver have shown up and can be seen in Discussions or Bugs, but not that I remember with Apple Silicone, but with AMD GPU's. Also as your MACOS is latest, I would think any Apple Silicone driver issue would be resolved.

Fairly sure an Adobe tech support document exists on GPU issues and some possible fix's (basically based around a corrupt reading by LrC of the GPU). Ah a Camera Raw GPU Config.txt file.(deleting this file with LrC closed, then restarting LrC should recreate it)

• https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html
• https://helpx.adobe.com/lightroom-classic/kb/lightroom-gpu-faq.html

And I suspect many will recommend seeing if resetting the LrC preferences file will help. 

The LrC preference file, an actual file, can get corrupted, leading to all sorts of issues. Mind you, this might be seen as a magic bullet, and it might not be the issue. And be aware that resetting ((a.k.a deleting) the preferences file will reset many if not all preference settings to defaults. Note that I am not saying that a particular setting is at fault, but the preference file is corrupt (it has all sorts of bits and pieces it controls). Deleting the LrC preference file (two ways to do that) then restarting LrC should result in a new preference file being created(upgrades, updates, and app uninstall/reinstalls do not)

• https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/
• https://helpx.adobe.com/lightroom-classic/help/reset-preferences.html

By the way, should you attempt resetting the preference file, a recent issue a member had post reset was with presets. If you turn on the option to store presets with catalog, that LrC knowledge of where the presets are will get royally fouled up. Easily fixed if you know before hand that your presets may need to be fixed. just saying.

[GoldingD]

Ah see:

https://community.adobe.com/t5/lightroom-classic-discussions/denoise-stopped-working/m-p/14092087

Your GPU unsupported and this other members GPU unsupported, similar although your issue odd blurring on your monitor when adjusting, other members an issue with AI Denoise.

Try the above before trying the preferences file.

[lukem89830369]

I have an issue that just started - it happens when I edit photos in Lightroom - when I move the slider, the image gets blurry and then when I let it go, it goes back to being sharp.  If I zoom into the image a little, the problem doesn't happen.  It is driving me insane. Please see attached video of the issue.  I am using Mac Book Pro M1 and Lightroom Classic 14.2 and have been using it for last 3 years.  This issue just started and I am not sure what caused it.  I was reasing about the Graphics processor but mine is turned off.  Snyone has any idea how to fix this?  Thank you.

[GoldingD]

Moderator,  Notice that the author has posted both a Bug and a Discussion on the same issue, and probably better as a Discussion. Perhaps a merge is called for?