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  1. Qt
  2. QTBUG-117528

[REG 6.3.2->6.5.2] QMediaPlayer always captures the audio device what blocks sleep mode on Windows

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Details

    • Bug
    • Resolution: Fixed
    • P2: Important
    • 6.5, 6.6.1
    • 6.5.2, 6.6.0 RC
    • Multimedia
    • None
    • Windows
    • 194b1b22d (dev), ac55a1c16 (6.6), f63286ea8 (6.5)

    Description

      When a QMediaPlayer object is created, the audio device is immediately captured even though playback has not started. This leads to the fact that the Windows system cannot go into sleep mode using a timer (i.e., in the system settings it is specified to go into sleep mode after, for example, 2 minutes of inactivity).

      To check whether an audio device is in use in Windows, you can use the command (in the terminal):

      powercfg /requests

      Here is an example of the output when the device is in use:

      powercfg /requests
DISPLAY:
None.SYSTEM:
[DRIVER] USB Audio Device (USB\VID_09DA&PID_2701&MI_00\9&2ac84e6b&0&0000)
An audio stream is currently in use.AWAYMODE:
None.EXECUTION:
None.PERFBOOST:
None.ACTIVELOCKSCREEN:
None.

      There is no this problem on version Qt6.3.2

      I am attaching a minimal project to reproduce the problem:

      QtWindowsAudioDeviceCaptureBugTest.zip

       

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        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-118755 QMediaPlayer and QSoundEffect block PC from sleep

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-112512 QSoundEffect cuts out on very short sounds ( ~ 0.2 - 0.3 seconds )

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-117612 [REG 6.3.2->6.5.2] Windows 10: CPU core stucks at minimum friequency

          • 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; 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
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              padubsky Pavel Dubsky
              rumgot rumgot
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              Dates

                Created:
                Updated:
                Resolved:

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