Fedora 42 on this system still complains about "dummy regulator", but the devices show up in aplay: https://linux-hardware.org/?probe=484d90bffe
This seems more problematic: "cs42l43 sdw:0:0:01fa:4243:01: Failed to read IRQ status: -16" -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2125284 Title: ASUS Zenbook S14 UX5406SA (Lunar Lake): no internal audio – cs42l43/cs35l56 report missing power supplies (“using dummy regulator”) on Ubuntu 25.10 beta (kernel 6.17) Status in alsa-driver package in Ubuntu: New Bug description: Summary On an ASUS Zenbook S14 UX5406SA (Lunar Lake) running Ubuntu 25.10 beta, the internal speakers/mic do not work. SOF topology for this model is present (l23), firmware packages are current, but the cs42l43 codec and cs35l56 amplifiers fail to initialize due to missing power supplies (kernel falls back to “dummy regulator”). Likely a kernel/platform (ACPI/regulator mapping) issue rather than SOF firmware. System Device: ASUS Zenbook S14 UX5406SA (Lunar Lake) Ubuntu: 25.10 beta (Questing) Kernel: 6.17.0-4-generic (uname -a: Linux ubuntu 6.17.0-4-generic #4-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 8 16:09:17 UTC 2025 x86_64 GNU/Linux) Firmware/UCm: firmware-sof-signed 2025.05.1-1 (installed & candidate) alsa-ucm-conf 1.2.12-1ubuntu2 Topology files present (excerpt): /lib/firmware/intel/sof-ipc4-tplg/ sof-lnl-cs42l43-l0-cs35l56-l23-2ch.tplg sof-lnl-cs42l43-l0-cs35l56-l23-4ch.tplg sof-lnl-cs42l43-l0-cs35l56-l23.tplg ALSA Card: 0 [sofsoundwire]: sof-soundwire - sof-soundwire ASUSTeKCOMPUTERINC.-ASUSZenbookS14UX5406SA_UX5406SA-1.0-UX5406SA Observed behavior (dmesg excerpts) sof-audio-pci-intel-lnl ...: SoundWire enabled on CannonLake+ platform, using SOF driver cs42l43 sdw:0:0:01fa:4243:01: supply vdd-p not found, using dummy regulator cs42l43 sdw:0:0:01fa:4243:01: supply vdd-d not found, using dummy regulator cs42l43 sdw:0:0:01fa:4243:01: supply vdd-a not found, using dummy regulator cs42l43 sdw:0:0:01fa:4243:01: supply vdd-io not found, using dummy regulator cs42l43 sdw:0:0:01fa:4243:01: supply vdd-cp not found, using dummy regulator ... cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_P not found, using dummy regulator cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_IO not found, using dummy regulator cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_A not found, using dummy regulator ... cs42l43-codec cs42l43-codec: supply vdd-amp not found, using dummy regulator ... cs42l43 sdw:0:0:01fa:4243:01: Failed to read IRQ status: -16 What I expected With current firmware-sof-signed and the correct l23 topology present, the codec/amps should get proper regulator supplies via ACPI/platform definitions and initialize, providing working internal speakers/mic. What I get Only HDMI/DP sinks appear; internal speakers/mic are non-functional (PipeWire shows “Dummy Output”/no sinks). The drivers explicitly warn about missing supplies and fail to attach properly on SoundWire. Why I believe this is a kernel/platform issue SOF firmware and topology files are present and up-to-date. Errors indicate missing regulator supplies (VDD_P, VDD_A, VDD_IO, etc.) for cs42l43/cs35l56, which are normally provided via ACPI/regulator mappings in the platform layer. Fedora reportedly has this model working already; likely their kernel carries upstream/backported fixes for Lunar Lake + cs42l43/cs35l56 regulator/ACPI integration. Request Please review and pull/backport the upstream fixes that define the required regulators/mappings for ASUS UX5406SA (Lunar Lake) using cs42l43 + cs35l56 on SoundWire. If additional UCM tweaks are needed for the l23 variant, please advise. Commands used: uname -a apt policy firmware-sof-signed alsa-ucm-conf ls /lib/firmware/intel/sof-ipc4-tplg/ | grep l23 cat /proc/asound/cards dmesg | grep -i -e snd_sof -e soundwire -e cs42l43 -e cs35l56 | tail -n 200 ubuntu@ubuntu:~$ uname -a Linux ubuntu 6.17.0-4-generic #4-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 8 16:09:17 UTC 2025 x86_64 GNU/Linux ubuntu@ubuntu:~$ apt policy firmware-sof-signed alsa-ucm-conf firmware-sof-signed: Installed: 2025.05.1-1 Candidate: 2025.05.1-1 Version table: *** 2025.05.1-1 500 500 cdrom://Ubuntu 25.10 _Questing Quokka_ - Beta amd64 (20250917.2) questing/main amd64 Packages 500 cdrom://Ubuntu 25.10 _Questing Quokka_ - Beta amd64 (20250917.2) questing/main i386 Packages 500 http://archive.ubuntu.com/ubuntu questing/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu questing/main i386 Packages 100 /var/lib/dpkg/status alsa-ucm-conf: Installed: 1.2.12-1ubuntu2 Candidate: 1.2.12-1ubuntu2 Version table: *** 1.2.12-1ubuntu2 500 500 http://archive.ubuntu.com/ubuntu questing/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu questing/main i386 Packages 100 /var/lib/dpkg/status ubuntu@ubuntu:~$ ls /lib/firmware/intel/sof-ipc4-tplg/ | grep l23 sof-adl-cs42l43-l0-cs35l56-l23.tplg sof-arl-cs42l43-l0-cs35l56-l23.tplg sof-lnl-cs42l43-l0-cs35l56-l23-2ch.tplg sof-lnl-cs42l43-l0-cs35l56-l23-4ch.tplg sof-lnl-cs42l43-l0-cs35l56-l23.tplg sof-lnl-rt711-l0-rt1316-l23-rt714-l1.tplg sof-mtl-cs42l43-l0-cs35l56-l23.tplg sof-mtl-rt711-l0-rt1316-l23-rt714-l1.tplg ubuntu@ubuntu:~$ cat /proc/asound/cards 0 [sofsoundwire ]: sof-soundwire - sof-soundwire ASUSTeKCOMPUTERINC.-ASUSZenbookS14UX5406SA_UX5406SA-1.0-UX5406SA ubuntu@ubuntu:~$ sudo dmesg | grep -i -e snd_sof -e soundwire -e cs42l43 -e cs35l56 | tail -n 200 [ 10.413856] sof-audio-pci-intel-lnl 0000:00:1f.3: SoundWire enabled on CannonLake+ platform, using SOF driver [ 11.010122] cs42l43 sdw:0:0:01fa:4243:01: supply vdd-p not found, using dummy regulator [ 11.010225] cs42l43 sdw:0:0:01fa:4243:01: supply vdd-d not found, using dummy regulator [ 11.010250] cs42l43 sdw:0:0:01fa:4243:01: supply vdd-a not found, using dummy regulator [ 11.010263] cs42l43 sdw:0:0:01fa:4243:01: supply vdd-io not found, using dummy regulator [ 11.010279] cs42l43 sdw:0:0:01fa:4243:01: supply vdd-cp not found, using dummy regulator [ 11.015735] cs42l43 sdw:0:0:01fa:4243:01: devid: 0x042a43, rev: 0xa1, otp: 0x03 [ 11.046810] cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_P not found, using dummy regulator [ 11.046865] cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_IO not found, using dummy regulator [ 11.046875] cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_A not found, using dummy regulator [ 11.054838] cs35l56 sdw:0:2:01fa:3556:01:0: Cirrus Logic CS35L56 Rev B0 OTP3 fw:3.4.4 (patched=0) [ 11.062578] cs35l56 sdw:0:2:01fa:3556:01:0: Slave 2 state check1: UNATTACHED, status was 1 [ 11.062778] cs35l56 sdw:0:2:01fa:3556:01:1: supply VDD_P not found, using dummy regulator [ 11.062831] cs35l56 sdw:0:2:01fa:3556:01:1: supply VDD_IO not found, using dummy regulator [ 11.062846] cs35l56 sdw:0:2:01fa:3556:01:1: supply VDD_A not found, using dummy regulator [ 11.070812] cs35l56 sdw:0:2:01fa:3556:01:1: Cirrus Logic CS35L56 Rev B0 OTP3 fw:3.4.4 (patched=0) [ 11.072524] sof-audio-pci-intel-lnl 0000:00:1f.3: Topology file: intel/sof-ipc4-tplg/sof-lnl-cs42l43-l0-cs35l56-l23-2ch.tplg [ 11.078035] cs35l56 sdw:0:3:01fa:3556:01:2: supply VDD_P not found, using dummy regulator [ 11.078066] cs35l56 sdw:0:3:01fa:3556:01:2: supply VDD_IO not found, using dummy regulator [ 11.078071] cs35l56 sdw:0:3:01fa:3556:01:2: supply VDD_A not found, using dummy regulator [ 11.085803] cs35l56 sdw:0:3:01fa:3556:01:2: Cirrus Logic CS35L56 Rev B0 OTP3 fw:3.4.4 (patched=0) [ 11.085911] cs35l56 sdw:0:2:01fa:3556:01:1: Slave 1 state check1: UNATTACHED, status was 1 [ 11.089553] cs42l43 sdw:0:0:01fa:4243:01: Slave 6 state check1: UNATTACHED, status was 1 [ 11.092655] cs35l56 sdw:0:3:01fa:3556:01:2: Slave 2 state check1: UNATTACHED, status was 1 [ 11.092663] cs35l56 sdw:0:3:01fa:3556:01:3: supply VDD_P not found, using dummy regulator [ 11.092683] cs35l56 sdw:0:3:01fa:3556:01:3: supply VDD_IO not found, using dummy regulator [ 11.092688] cs35l56 sdw:0:3:01fa:3556:01:3: supply VDD_A not found, using dummy regulator [ 11.099500] cs35l56 sdw:0:3:01fa:3556:01:3: Cirrus Logic CS35L56 Rev B0 OTP3 fw:3.4.4 (patched=0) [ 11.110428] cs35l56 sdw:0:3:01fa:3556:01:3: Slave 1 state check1: UNATTACHED, status was 1 [ 11.706761] cs42l43-codec cs42l43-codec: supply vdd-amp not found, using dummy regulator [ 11.735217] cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_B not found, using dummy regulator [ 11.735235] cs35l56 sdw:0:2:01fa:3556:01:0: supply VDD_AMP not found, using dummy regulator [ 11.737319] cs35l56 sdw:0:2:01fa:3556:01:1: supply VDD_B not found, using dummy regulator [ 11.737344] cs35l56 sdw:0:2:01fa:3556:01:1: supply VDD_AMP not found, using dummy regulator [ 11.740916] cs35l56 sdw:0:3:01fa:3556:01:2: supply VDD_B not found, using dummy regulator [ 11.740927] cs35l56 sdw:0:3:01fa:3556:01:2: supply VDD_AMP not found, using dummy regulator [ 11.743148] cs35l56 sdw:0:3:01fa:3556:01:3: supply VDD_B not found, using dummy regulator [ 11.743179] cs35l56 sdw:0:3:01fa:3556:01:3: supply VDD_AMP not found, using dummy regulator [ 11.752570] cs35l56 sdw:0:3:01fa:3556:01:3: DSP1: cirrus/cs35l56-b0-dsp1-misc-10431e13.wmfw: format 3 timestamp 0x65e6703c To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/2125284/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
