darktable sporadically freezes without error reporting. Just freeze

Is there an existing issue for this?

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

Describe the bug

I did check open issues and searched for "crash" but they all do not really describe, what happens here.

• I have this problem already since some weeks
• It happens roughly once per two hours
• During editing suddenly the whole gui freezes

Corrently I have no idea how to reproduce or how to provoke it

Steps to reproduce

1. keep editing
2. suddenly the whole gui is frozen

Expected behavior

darktable should not freeze, it is summer :-)

Logfile | Screenshot | Screencast

Because I was waiting for it, I started dt with -d common -d verbose and here is the output.

The last thing I did was this time, go to color calibration, open menu, chose a preset and then right click on one preset. After I decided, I didn't like the effect, I went to history, chose second last entry and pressed ctrl+"compress history stack" and BANG

dt-crash_2026-08-10.txt

Commit

No response

Where did you obtain darktable from?

self compiled

darktable version

5.7.0-434-gc19e88f8d8

What OS are you using?

Linux

What is the version of your OS?

gentoo, see below

Describe your system

• darktable version : 5.7.0-434-gc19e88f8d8
• OS : Linux - kernel 6.18.41-gentoo
• Distro : Gentoo Base System release 2.18
• Processor : Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz
• Memory : 32 GB (4 x 8 GB) + 5GB Swap
• Graphics card0 : NVIDIA GeForce GTX 1060 6GB
• Graphics card1 : NVIDIA GeForce RTX 2070 SUPER
• Graphics driver : nvidia-drivers-535.309.01
• OpenCL installed : Yes (opencl-headers-2024.10.24)
• OpenCL activated : Yes
• Xorg : xorg-server-21.1.24
• Desktop : KDE 6
• GTK+ : gtk+-3.24.52
• gcc : 14.3.1_p20260604
• cflags : CMAKE_FLAGS="-march=native-O2-mtune=native-pipe"
• CMAKE_BUILD_TYPE : "Release"

Are you using OpenCL GPU in darktable?

Yes

If yes, what is the GPU card and driver?

please see above

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

No response

Start by reviewing the attached dt-crash_2026-08-10.txt logfile and the reported sequence involving color calibration, a preset context menu, and compressing the history stack. Investigate the freeze under the stated Linux, OpenCL, and NVIDIA setup; done means identifying the cause and preventing this sporadic GUI freeze or producing actionable error reporting.