https://bugs.kde.org/show_bug.cgi?id=477522
Bug ID: 477522
Summary: Visual feedback of currently playing audio in
plasma-pa with pipewire breaks bluetooth headset power
management and pipewire adaptive sample rate
Classification: Plasma
Product: plasma-pa
Version: 5.27.9
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: applet
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected], [email protected]
Target Milestone: ---
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
STEPS TO REPRODUCE
1. Set `default.clock.allowed-rates = [ 48000 44100 96000 ]` as described in
https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Config-PipeWire#setting-sample-rates
and restart pipewire
2. No plasma PA clients available in `pw-top` (because the widget was never
opened after the pipewire restart):
Try playing audio and pause it: after some time bluetooth headset stops playing
white noise which means that it has entered power-saving state
Trying sample rate switch:
Play some audio with 44100 sample rate: (`pw-top`)
R 68 1024 44100 20.1us 27.4us 0.00 0.00 0 S16LE 2 48000
bluez_output.00_0A_45_0E_94_F7.1
R 61 1102 44100 --- 0.0us --- 0.00 0 F32LE 2 44100 +
alsa_playback.mpv
The graph is running at 44100
Pause the audio and switch to the 48000 audio source:
The graph switches to 48000 sample rate
R 68 2048 48000 33.1us 7.9us 0.00 0.00 0 S16LE 2 48000
bluez_output.00_0A_45_0E_94_F7.1
I 61 1102 44100 --- 0.0us --- 0.00 0 F32LE 2 44100 +
alsa_playback.mpv
R 74 3600 48000 13.6us 13.1us 0.00 0.00 0 F32LE 2 48000 +
Firefox
3. Open the plasma-pa widget. Observe that a new client appeared for the output
device:
R 68 1024 44100 102.3us 49.2us 0.00 0.00 0 S16LE 2 48000
bluez_output.00_0A_45_0E_94_F7.1
I 61 1102 44100 --- 0.0us --- 0.00 0 F32LE 2 44100 +
alsa_playback.mpv
I 74 3600 48000 20.7us 18.9us 0.00 0.00 0 F32LE 2 48000 +
Firefox
R 82 1 25 50.2us 9.8us 0.00 0.00 0 F32LE 1 25 +
Plasma PA
pw-top shows the `Plasma PA` client to be in `R=RUNNING` state
The bluetooth headset is now playing white noise without stopping (power
management no longer works)
Play some audio with 44100 sample rate: (`pw-top`)
R 68 1024 44100 37.0us 28.0us 0.00 0.00 0 S16LE 2 48000
bluez_output.00_0A_45_0E_94_F7.1
R 61 1102 44100 --- 0.0us --- 0.00 0 F32LE 2 44100 +
alsa_playback.mpv
I 74 3600 48000 20.7us 18.9us 0.00 0.00 0 F32LE 2 48000 +
Firefox
R 82 1 25 20.9us 6.3us 0.00 0.00 0 F32LE 1 25 +
Plasma PA
R 83 1 25 1.0ms 3.1us 0.04 0.00 0 F32LE 1 25 +
Plasma PA
The graph is running at 44100
Pause the audio and switch to the 48000 audio source:
R 68 1024 44100 60.7us 42.0us 0.00 0.00 0 S16LE 2 48000
bluez_output.00_0A_45_0E_94_F7.1
I 61 1102 44100 --- 0.0us --- 0.00 0 F32LE 2 44100 +
alsa_playback.mpv
R 82 1 25 13.1us 7.8us 0.00 0.00 0 F32LE 1 25 +
Plasma PA
I 83 1 25 459.4us 3.7us 0.02 0.00 0 F32LE 1 25 +
Plasma PA
R 84 3600 48000 22.2us 28.9us 0.00 0.00 0 F32LE 2 48000 +
Firefox
The graph no longer switches to 48000 sample rate. The graph is stuck at the
last used sample rate
OBSERVED RESULT
`Plasma PA` client always stays in `R=RUNNING` state which prevents the graph
from switching sample rate and prevents bluetooth devices to entering the
suspend state
EXPECTED RESULT
`Plasma PA` client should be able to switch to `I=IDLE` state
SOFTWARE/OS VERSIONS
$ kinfo
Operating System: Arch Linux
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 5.15.11
Kernel Version: 6.6.2-zen1-1-zen (64-bit)
Graphics Platform: offscreen
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 23.1 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3050 Ti Laptop GPU/PCIe/SSE2
ADDITIONAL INFORMATION
pipewire 0.3.85
wireplumber 0.4.16
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