This seems to have regressed on 7.0.0 kernel with Ubuntu 26. Difference
is it detects the hardware, level meters show activity, but no sound is
produced by internal speakers or headphones (when connected). Applied
Dell BIOS update (released yesterday) which did not change behavior.
Complete silence, with no errors surfaced at the kernel, ALSA, or
PipeWire/WirePlumber level.
System information
Machine: Dell 16 Plus, model DB16250
CPU/Platform: Intel Lunar Lake
Audio codec: Realtek RT722 (SoundWire)
SOF firmware: ADSPFW 2.14.1.1 (booted successfully)
Topology loaded: intel/sof-ipc4-tplg/sof-lnl-rt722-l0.tplg (ABI 3:29:1, Kernel
ABI 3:23:1)
Sound card: sof-soundwire / DellInc.-Dell16PlusDB16250-07V73W
Diagnostic steps already performed (ruling out common causes)
1. Kernel driver loads and initializes cleanly
$ dmesg | grep -i -E "sof|soundwire|snd"
sof-audio-pci-intel-lnl 0000:00:1f.3: DSP detected with PCI
class/subclass/prog-if 0x040380
sof-audio-pci-intel-lnl 0000:00:1f.3: hda codecs found, mask 4
sof-audio-pci-intel-lnl 0000:00:1f.3: Firmware file:
intel/sof-ipc4/lnl/sof-lnl.ri
sof-audio-pci-intel-lnl 0000:00:1f.3: Loaded firmware library: ADSPFW, version:
2.14.1.1
sof-audio-pci-intel-lnl 0000:00:1f.3: Booted firmware version: 2.14.1.1
sof-audio-pci-intel-lnl 0000:00:1f.3: loading topology:
intel/sof-ipc4-tplg/sof-lnl-rt722-l0.tplg
sof-audio-pci-intel-lnl 0000:00:1f.3: Topology: ABI 3:29:1 Kernel ABI 3:23:1
sof_sdw sof_sdw: ASoC: Parent card not yet available, widget card binding
deferred
2. ALSA sees the Speaker PCM device
$ aplay -l
card 0: sofsoundwire [sof-soundwire], device 2: Speaker (*) []
3. Every relevant mixer control is unmuted and at normal levels
$ amixer -c 0 contents
Speaker Switch: on
Pre Mixer Speaker Playback Volume: 45/45 (max, unmuted; dBscale-min=-90dB,
step=2dB)
Post Mixer Speaker Playback Volume: 45/45 (max, unmuted)
Post Mixer Speaker Playback DRC switch: on
rt722 FU06 Playback Volume: 67/87 (normal operating level, not muted)
No control anywhere in the chain is muted or at zero.
4. PipeWire correctly routes to the Speaker sink
$ wpctl status
Sinks:
* 61. Lunar Lake-M HD Audio Controller Speaker [vol: 0.68]
Streams:
106. speech-dispatcher-dummy
109. output_FL > Speaker:playback_FL [init]
110. output_FR > Speaker:playback_FR [init]
Speaker is the default sink, unmuted, with an active stream correctly
routed to it.
5. Hardware-level test bypassing PipeWire entirely
speaker-test -D hw:0,2 -c 2 -t wav
Result: confirmed silence, even writing directly to the hardware PCM
device with no audio server involved.
Conclusion
Every layer of the stack — kernel driver, firmware boot, topology load, ALSA
mixer state, and PipeWire routing — reports success and shows a fully open,
unmuted signal path. Yet no audio is physically produced, even when bypassing
the desktop audio stack entirely. This strongly suggests the SOF
firmware/topology for this board is not actually enabling the physical speaker
amplifier output, despite reporting a successful playback stream. This may be a
missing board-specific quirk or amp-enable sequence for the Dell 16 Plus
DB16250 in the SOF topology or ASoC machine driver.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2120764
Title:
No sound on Dell 16 Plus
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.14/+bug/2120764/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
