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P: Colored "pixel" artifacts/subdued blacks in shadow areas (older Macs) (also visible on CR)

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I updated LrC to 12.4 yesyerday. Since then a number of pixels in multiple colors appear appear quite often on the image, mostly in the areas of blacks/darks and when using Tone Curve commands. It's similar to the red/blue pixels which denoted clipping in the areas of blacks/whites, but they appear in very many different other colors. Sometimes they disappear, or decrease, after actioning the commands again, sometimes they do not. Is anybody else facing the same problem which I encounter now for the vey first time after many years of use of LrC? Thank you in advance for your advise.

macOS

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mikeo35829746

Participant

My problem with splotchy areas in the dark shadows has been resolved. I was at LR Classic 13.0.1 which I uninstalled. I then installed version 12.5. I also turned off auto update in the CC App. Looks like the most recent version was released out into the wild world of working professionals with some bugs!

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Susu4478

Participant

Gracias por todas vuestras respuestas. Al final se trata de un tema de incompatibilidad de la tarjeta gráfica con la nueva versión de Lr y no he tenido más remedio que actualizar mi iMac. Ninguno de los "trucos" que leí me funcionó y desde ayer ya tengo mi nueva máquina.

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Massimo Senserini

Participant

I solved the problem quickly, but not definitively, by exiting and re-entering Lightroom, or by activating HDR in the basic menu,
 near the automatic and B&W buttons.

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patricks40041452

Participant

Hi !

Did someone had experimented this problem with exported files ? And by the way How disabled this fonction in the devellop module ? It appears time to time 3 weeks ago for me. Thanks a lot ! (LRC_13 + Mac OS Monterey)

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Massimo Senserini

Participant

I solved the problem quickly, but not definitively, by exiting and re-entering Lightroom, or by activating HDR in the basic menu,
 near the automatic and B&W buttons.

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Susu4478

Participant

Desde la actualización de LrC, tengo problemas de revelado con lo que parece un aviso de bajas luces, pero no es el que conocemos de toda la vida en el histograma, ya que este lo tengo desactivado. Pero me aparecen manchas en color Cian, Amarillo y Magenta en las zonas más oscuras, y lo peor es que estos avisos aparecen en el revelado.

¿Alguien me puede ayudar para resolver esto?

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dj_paige

Legend

I can't view your screen capture ... you should include screen capture by using the "Insert Photos" icon and not via file attachments.

Probably this problem: https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-bright-colored-pixels-in-shadow-areas-older-macs/idi-p/13865745

In this thread, it is stated: "This appears to occur on Lightroom 12.4 and later on very old Macs ( 8 Years and older) due to out-of-date video drivers on no longer-supported/updated GPUs. Some customers report that disabling GPU restores functionality to normal. Others have reported that updating to Sonoma has provided relief. "

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JordiGalderic

Participant

When typing accented characters in Lightroom Classic (MacOS Apple Silicon, latest version) the program crashes.

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Rikk Flohr-Retired

We’ve reviewed the email address you use with this forum and find no crash reports in our system.

Did you see a crash dialog?

Do you use a different email address when filling out the crash report?

Was the crash dialog Adobe’s? Apple’s?

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Rikk Flohr: Adobe Photography Org

J

JordiGalderic

Participant

Couldn't send any report because Lightroom Classic automatically stopped. No crash dialogue from Adobe or Apple.
I can replicate the error easily, just typing, i.e, ò or à.
BTW, I'm using Sonoma 14.1.1

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johnrellis

Legend

@toto19, like the others, you're on an older Mac with a graphics processor whose drivers are no longer supported by AMD. See here for two possible workarounds:

https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-bright-colored-pixels-in-shadow-areas-older-macs/idc-p/14229610

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toto19

Participant

Version Lightroom Classic: 13.0.1 [ 202310121438-d2af310c ]
Licence: Creative Cloud
Paramètre de langue: fr-NC
Système d'exploitation : Mac OS 12
Version : 12.7.1 [21G920]
Architecture de l'application : x64
Nombre de processeurs logiques: 4
Vitesse du processeur : 3,2Ghz
Version SQLite: 3.36.0
Mémoire intégrée : 24 576,0 Mo
Mémoire réelle disponible pour Lightroom : 24 576,0 Mo
Mémoire réelle utilisée par Lightroom : 3 491,7 Mo (14,2%)
Mémoire virtuelle utilisée par Lightroom : 53 722,8 Mo
Taille de la mémoire cache : 1 080,1Mo
Version interne de Camera Raw: 16.0 [ 1677 ]
Nombre maximal de liens utilisé par Camera Raw : 3
Optimisation SIMD de Camera Raw : SSE2,AVX,AVX2
Mémoire virtuelle de Camera Raw: 1385Mo / 12287Mo (11%)
Mémoire réelle de Camera Raw: 1508Mo / 24576Mo (6%)
Taille d’aperçu standard: 6400 pixels
Affichages : 1) 6400x3600

Informations relatives au processeur graphique :
Metal: AMD Radeon R9 M390
État initial: GPU pour le traitement d'image pris en charge par défaut avec la prise en charge de l'exportation personnalisée
Préférence utilisateur: Auto

Dossier de l'application : /Applications/Adobe Lightroom Classic
Chemin d'accès à la bibliothèque : /Users/herve/Pictures/Catalogues/Photos/Photos-v13.lrcat
Dossier des paramètres : /Users/herve/Library/Application Support/Adobe/Lightroom

Modules installés :
1) Adobe Stock
2) DxO PhotoLab 4
3) DxO PhotoLab 4 Importer
4) DxO PhotoLab 5
5) DxO PhotoLab 5 Importer
6) DxO PhotoLab 6
7) DxO PhotoLab 6 Importer
😎 DxO PhotoLab 7
9) DxO PhotoLab 7 Importer
10) Flickr
11) HDR Efex Pro 2
12) Module externe d'importateur Aperture/iPhoto
13) Module externe de prise de vue en mode connecté Nikon
14) Paramètres du plugin

Marqueurs Config.lua: None

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