February 1, 2026
Instructions: Linux
Step 1: Open Terminal
Open your preferred terminal (e.g., using Ctrl + Alt + T).
Step 2: Start the Command
Copy the following command into your terminal:
darktable -d perf -d opencl >> ~/darktable_log.txt 2>&1
Note: The terminal must remain open while using darktable!
Step 3: Select File in the Tool
Click on “Select Log File” and choose the darktable_log.txt file from your personal home directory.
Instructions: Windows
Step 1: Open Command Prompt
Press the Windows key, type cmd, and press Enter.
Step 2: Copy & Start the Command
Copy the following command and paste it into the command prompt:
darktable -d perf -d opencl >> %USERPROFILE%\Desktop\darktable_log.txt 2>&1
Note: The command prompt must remain open while using darktable!
Step 3: Select File in the Tool
Click on “Select Log File” and choose the darktable_log.txt file from your desktop.
Raw Log Output
Browser compatibility for the Realtime Monitor
This tool uses the modern File System Access API to read local log files in real time without having to constantly re-upload them. Since this is an advanced browser feature, the following requirements apply:
- Supported browsers: The tool only works in Chromium-based browsers. These include Google Chrome, Microsoft Edge, Brave, and Opera (desktop versions only).
- Not supported: In Firefox and Safari, this feature is currently disabled for security reasons. The “Select Log File” button will not respond in these browsers.
*This feature must be enabled in Brave. To do so, enter the following command in your browser’s address bar: brave://flags/#file-system-access-api
