[filmic RGB] image turning blue sometimes when using the picker

[paolobenve]

Is there an existing issue for this?

• I checked and did not find my issue in the already reported ones

Describe the bug

Sometimes when clicking the picker in the scene tab, the images turns blueish.

Issuing ctl-z and re clicking the picker, usually the blue tint doesn't appear any more.

Steps to reproduce

1. open an image in darkroom
2. make all your editing, I usually make rotate and perspective, crop, and exposure
3. go to filmic rgb
4. click the picker

Expected behavior

no color change is expected, however sometimes a turn to blue happens

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

self compiled

darktable version

5.0.1+1~g7e181e4353-dirty

What OS are you using?

Linux

What is the version of your OS?

ubuntu 24.04

Describe your system

No response

Are you using OpenCL GPU in darktable?

Yes

If yes, what is the GPU card and driver?

nvidia 3060

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

No response

[paolobenve]

The blueish image

The "original" one

[m-p-y]

Maybe I experience something similar; my workaround is to switch "high quality processing" on and off:

Then, the color cast vanishes.

[kupospelov]

I'm affected by this as well. In fact, at some point I started seeing this much more often and pretty much every other image gets this blueish tint when I click the filmic rgb picker. Sometimes changing the exposure can also trigger it.

I reproduced this in v5.0.1, then compiled and checked 5.1.0+925~g48486b7fc6 and the issue was still there.

I run Archlinux on a laptop with AMD 7840u and Radeon m780 iGPU, so I guess it's unrelated to the GPU or drivers.