I am experiencing no audio output from the internal speakers or the 3.5mm headphone jack on a new Intel Panther Lake laptop (LG Gram). The kernel detects the SoundWire amplifiers (Realtek 1320 and 0713) but fails to find a machine driver for the ACPI-reported configuration. It falls back to a generic driver, which only maps the DMIC and HDMI outputs, leaving the primary PCM audio unavailable. This shows up as "Dummy Output" in the output selector
Hardware:
System Model: LG Gram 17Z90U (17Z90U-G.AU85A3)
CPU: Intel Core Ultra (Panther Lake)
Audio Controller: Intel Panther Lake HDMI (sof-audio-pci-intel-ptl)
Amplifiers/Codecs (from dmesg): Realtek part_id 0x1320 and part_id 0x0713
Software / OS:
OS: Arch Linux
Kernel: linux-mainline
SOF Firmware Version: 2.14.1.1
Relevant Kernel Logs
[ 8.340849] sof-audio-pci-intel-ptl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration: [ 8.340853] sof-audio-pci-intel-ptl 0000:00:1f.3: link 1 mfg_id 0x025d part_id 0x1320 version 0x3 [ 8.340855] sof-audio-pci-intel-ptl 0000:00:1f.3: link 3 mfg_id 0x025d part_id 0x0713 version 0x3 [ 8.340859] sof-audio-pci-intel-ptl 0000:00:1f.3: Use SoundWire default machine driver with function topologies [ 8.340860] sof-audio-pci-intel-ptl 0000:00:1f.3: hda codecs found, mask 4 [ 8.340863] sof-audio-pci-intel-ptl 0000:00:1f.3: NHLT device BT(0) detected, ssp_mask 0x4 [ 8.340864] sof-audio-pci-intel-ptl 0000:00:1f.3: BT link detected in NHLT tables: 0x4 [ 8.340865] sof-audio-pci-intel-ptl 0000:00:1f.3: DMICs detected in NHLT tables: 2 [ 8.342996] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware paths/files for ipc type 1: [ 8.342999] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware file: intel/sof-ipc4/ptl/sof-ptl.ri [ 8.343000] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware lib path: intel/sof-ipc4-lib/ptl [ 8.343001] sof-audio-pci-intel-ptl 0000:00:1f.3: Topology file: function topologies [ 8.668046] sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no PCM in topology for HDMI converter 3
Please see attached alsa-info.txt
I am experiencing no audio output from the internal speakers or the 3.5mm headphone jack on a new Intel Panther Lake laptop (LG Gram). The kernel detects the SoundWire amplifiers (Realtek 1320 and 0713) but fails to find a machine driver for the ACPI-reported configuration. It falls back to a generic driver, which only maps the DMIC and HDMI outputs, leaving the primary PCM audio unavailable. This shows up as "Dummy Output" in the output selector
Hardware:
System Model: LG Gram 17Z90U (17Z90U-G.AU85A3)
CPU: Intel Core Ultra (Panther Lake)
Audio Controller: Intel Panther Lake HDMI (sof-audio-pci-intel-ptl)
Amplifiers/Codecs (from dmesg): Realtek part_id 0x1320 and part_id 0x0713
Software / OS:
OS: Arch Linux
Kernel: linux-mainline
SOF Firmware Version: 2.14.1.1
Relevant Kernel Logs
[ 8.340849] sof-audio-pci-intel-ptl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration: [ 8.340853] sof-audio-pci-intel-ptl 0000:00:1f.3: link 1 mfg_id 0x025d part_id 0x1320 version 0x3 [ 8.340855] sof-audio-pci-intel-ptl 0000:00:1f.3: link 3 mfg_id 0x025d part_id 0x0713 version 0x3 [ 8.340859] sof-audio-pci-intel-ptl 0000:00:1f.3: Use SoundWire default machine driver with function topologies [ 8.340860] sof-audio-pci-intel-ptl 0000:00:1f.3: hda codecs found, mask 4 [ 8.340863] sof-audio-pci-intel-ptl 0000:00:1f.3: NHLT device BT(0) detected, ssp_mask 0x4 [ 8.340864] sof-audio-pci-intel-ptl 0000:00:1f.3: BT link detected in NHLT tables: 0x4 [ 8.340865] sof-audio-pci-intel-ptl 0000:00:1f.3: DMICs detected in NHLT tables: 2 [ 8.342996] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware paths/files for ipc type 1: [ 8.342999] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware file: intel/sof-ipc4/ptl/sof-ptl.ri [ 8.343000] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware lib path: intel/sof-ipc4-lib/ptl [ 8.343001] sof-audio-pci-intel-ptl 0000:00:1f.3: Topology file: function topologies [ 8.668046] sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no PCM in topology for HDMI converter 3Please see attached alsa-info.txt