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  1. Qt
  2. QTBUG-136077

[Regression 6.8.2->6.8.3] Android apps hang with black screen or splash screen

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Details

    • Bug
    • Resolution: Duplicate
    • P1: Critical
    • 6.8.4, 6.9.1
    • 6.8.3, 6.9.0
    • QPA: Android
    • None
    • Android API 34/35
    • Android
    • 270d59f65 (dev), a003aafd8 (6.9.1), 5910b3475 (tqtc/lts-6.8)
    • 2025wk18s1QtforAndroid, 2025wk20s1QtforAndroid
    • Android

    Description

      in Qt Creator, go to examples, select "Coffee machine". Select Android+6.8.3, configure and build it. (or 6.9.0)

      Tested on multiple android phones, sdk level 34 for the build, but tested on both Android 14 and 15 phones.

      The hang happens more or less randomly, HOWEVER:

      To reproduce it every time:

      (1) go to developer options and select "Don't keep activities" and "background process limit: no background processes"

      (2) start the coffee machine app. it works fine.

      (3) put it in the background

      (4) bring it back, it hangs at a black screen. you might have to give a couple of tries to get it to hang, but it always hangs.

      This bug didn't exist in 6.8.2. The bug happens often enough to render 6.8.3/6.9.0 nearly unusable for android apps.

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-136497 Android app fails to restart when permission is revoked

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; Flaky tests; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-135961 Blank screen when app is woken up from background

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; Flaky tests; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-136497 Android app fails to restart when permission is revoked

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; Flaky tests; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          resulted from

          Task - A task that needs to be done. QTBUG-12371 Please integrate change 5e037125 into 4.7.0

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
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              bartlomiejmoskal Bartlomiej Moskal
              dwyco dwight melcher
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              Dates

                Created:
                Updated:
                Resolved:

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