[Fixed] Monochrome module broken at head (all platforms)

Software darktable
1

I am on macOS Tahoe at 5.3.0+966~g82a390df5c. When I move around the color patches the histogram changes but the image does not:

Only the main view appears to be broken. The small preview on the left panel reacts to the changes.

Is it just me or do others see this too?

2

Working for me on master updated today on NixOS (Linux) on Gnome Wayland.

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3

I can reproduce the issue with current master on Linux Mint 21.1 Cinnamon. Works fine with darktable 5.2.0 on the same machine.

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4

I can reproduce on Fedora 42 Gnome, DT built from today’s sources.

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5

DT 5.3 +951 reproduces this problem on Windows 11.

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6

Thank you all for verifying. I filed a bug:

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7

I can reproduce on Ubuntu 24.04 with latest master.
It’s interesting that in your case at least the histogram changes, but not the image rendering.
In my case not even the histogram changes when making modifications to the monochrome module.

8

For me turning off OPENCL fixed the issue…latest nightly on Win 11 so maybe its a code issue related to that part of the pipeline…

9

I got the same results - turning off OpenCL fixes the issue.

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10

PR from @hannoschwalm is ready. :slight_smile:

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11

Thank you so much @hannoschwalm for the fix and @Pascal_Obry for merging it so quickly :smiley:

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