Bug 513515

Summary:	Accepting one suggested recognized face makes the face recognition go through all pictures.
Product:	[Applications] digikam	Reporter:	david
Component:	Faces-Recognition	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	caulier.gilles
Priority:	NOR
Version First Reported In:	8.8.0
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description david 2025-12-17 22:46:43 UTC

SUMMARY
Accepting one suggested recognized face makes the face recognition process start and go through all pictures for HOURS(!!!) making it impossible to accept more recoginized faces for HOURS! I have a few TB of pictures and 8.8.0 becomes unusable due to this bug. Accepting one recognized face shouldn't trigger a process that locks functionality in DigiKam for HOURS.

STEPS TO REPRODUCE
1. accept one or several suggested recognized faces
2. see the face recognition process start
3. see DigiKam becoming slow and unresponsive for hours, making it impossible to accept any more suggested face recognitions, and making it impossible to tag any new faces in new photos too.

OBSERVED RESULT
See DigiKam becoming slow and unresponsive for hours, making it impossible to accept any more suggested face recognitions, and making it impossible to tag any new faces in new photos too.

EXPECTED RESULT
Just tag a face with the correct name, save to DB and to file, and do nothing more.
Not start a hours long full face recognition process after accepting one suggestion, just do nothing.
Only accepting the faces and not locking up DigiKam for hours.
Only run a full scan of face recognition on demand.
Not locking up DigiKam.

SOFTWARE/OS VERSIONS
Windows: 11 pro 25H2 26200.7462

ADDITIONAL INFORMATION
Please release a 8.8.1 quickly that restores the face recognition part to normal.
You should also do more testing before releasing important software that is central to people's precious photo collections.

Comment 1 caulier.gilles 2025-12-18 02:18:28 UTC

Problem is already fixed for new 8.9.0.

Go to Setup/Misc/Behavior and disable the option "Enable background face recognition scan"

https://docs.digikam.org/en/setup_application/miscs_settings.html#behavior-settings

Comment 2 caulier.gilles 2025-12-18 02:25:56 UTC

See bug 511761