Android-apps sometimes can't read QR-code

Bug Reports
#1

REPRODUCIBILITY: 25% ? (sometimes)
OSVERSION: 4.4.0.72
HARDWARE: Sony Xperia 10 III - xqbt52 - xqbt52 - 1.0.0.176 - aarch64
UI LANGUAGE: Deutsch (user: de_DE, os: de_DE.utf8)
REGRESSION: perhaps (?)

DESCRIPTION:

Using native Android-apps, the camera field keeps black, doesn’t dhow the QR-code.

PRECONDITIONS:

All apps had the necessary privileges for camera, the scanning sometimes worked before.

STEPS TO REPRODUCE:

  1. Open an Android-app like Covid Cert, CovPass or Signal.
  2. Try to scan QR-code.

EXPECTED RESULTS:

Code is scanned in the app.

ACTUAL RESULTS:

Nothing happens, the field stays black.

MODIFICATIONS:

  • Patchmanager: no
  • OpenRepos: yes
  • Chum: yes
  • Other: yes:
    Advanced camera app is installed.

ADDITIONAL INFORMATION:

After a reboot, scanning worked with the three mentioned apps directly. Can’t remember, if I had problems to scan with “Cov Cert”-App before, several certificates were already scanned (before 4.4.0.72); this time I had these problems.
Device Owner User: defaultuser
Home Encryption: enabled

the initial version of this bug report was created using Bugger 0.9.8+git1
#3

Perhaps an app has reserved the camera. Does Jolla Camera work when you get the black screen?

#4

I’ll try to test this, when I encounter the issue again. Some special “journalctl”-logs of interest, too?

#5

Perhaps someone else can interpret the logs, I don’t think I can get a lot out of them. Better to have them and not need them, as usual :slight_smile:

Signal for Android is notorious for reserving the camera; I have experienced that myself and that’s why I suggested trying Jolla Camera.