[Bug 2161970] [NEW] [regression] Acer Aspire A14-52MT has no audio on HDMI, speakers, or 3.5 mm jack with 7.0.0-28; 6.17.0-40 works

Public bug reported: Ubuntu 24.04.4 LTS on an Acer Aspire A14-52MT (Intel Lunar Lake) loses all physical audio output when booted with the Noble HWE kernel `7.0.0-28-generic`. The audio devices are enumerated normally. PipeWire and WirePlumber are running, the correct sinks can be selected, volumes are non-zero and unmuted, the HDMI ELD is valid, and ALSA playback reaches the `RUNNING` state. Nevertheless, HDMI, the internal speakers, and headphones connected to the laptop's 3.5 mm jack remain silent. Booting the same installation with `6.17.0-40-generic` immediately restores audio without any configuration or hardware changes. ### Hardware and software - Laptop: Acer Aspire A14-52MT - BIOS: V1.02, 2025-01-06 - Audio controller: Intel Lunar Lake-M HD Audio Controller `[8086:a828]` - Graphics controller used for HDMI: Intel Lunar Lake `[8086:64a0]`, `xe` driver - Audio driver: `sof-audio-pci-intel-lnl` - Analog codec: Realtek ALC245 - Ubuntu: 24.04.4 LTS (Noble) - Bad kernel: `7.0.0-28-generic` (`7.0.0-28.28~24.04.1`) - Good kernel: `6.17.0-40-generic` (`6.17.0-40.40~24.04.1`) - SOF firmware: `2.14.1.1` - Topology: `intel/sof-ipc4-tplg/sof-hda-generic-2ch.tplg` ### Steps to reproduce 1. Boot Ubuntu with `7.0.0-28-generic`. 2. Select `sof-hda-dsp Speaker + Headphones` or the HDMI output. 3. Play normal desktop audio or run: `speaker-test -D hw:0,0 -c 2 -r 48000 -F S16_LE -t wav -l 1` For HDMI: `speaker-test -D hw:0,3 -c 2 -r 48000 -F S16_LE -t wav -l 1` 4. Observe that playback completes without an ALSA error but no sound is heard. 5. Reboot into `6.17.0-40-generic` and repeat the test. 6. Audio works normally. ### Expected result Audio is audible from the selected HDMI or analog output with `7.0.0-28-generic`, as it is with `6.17.0-40-generic`. ### Actual result All physical audio outputs are silent with `7.0.0-28-generic`. ### Diagnostic observations - `wpctl status` exposes all expected sinks on both kernels. - The HDMI monitor is detected with a valid ELD and stereo LPCM support. - `Master`, `Headphone`, `Speaker`, and the relevant IEC958 playback switches are enabled. - Direct ALSA tests and PipeWire-targeted tests are both silent on 7.0. - The same installed SOF firmware, topology, ALSA UCM configuration, monitor, cable, and user-space audio stack are used on both boots. - The kernel initialization logs do not show an obvious audio error and are nearly identical, making the good/bad kernel comparison important. - Reproducibility: 100% in the tested boots. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: noble regression-update ** Attachment added: "audio-kernel-regression-sanitized.log" https://bugs.launchpad.net/bugs/2161970/+attachment/5987349/+files/audio-kernel-regression-sanitized.log -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2161970 Title: [regression] Acer Aspire A14-52MT has no audio on HDMI, speakers, or 3.5 mm jack with 7.0.0-28; 6.17.0-40 works Status in linux package in Ubuntu: New Bug description: Ubuntu 24.04.4 LTS on an Acer Aspire A14-52MT (Intel Lunar Lake) loses all physical audio output when booted with the Noble HWE kernel `7.0.0-28-generic`. The audio devices are enumerated normally. PipeWire and WirePlumber are running, the correct sinks can be selected, volumes are non-zero and unmuted, the HDMI ELD is valid, and ALSA playback reaches the `RUNNING` state. Nevertheless, HDMI, the internal speakers, and headphones connected to the laptop's 3.5 mm jack remain silent. Booting the same installation with `6.17.0-40-generic` immediately restores audio without any configuration or hardware changes. ### Hardware and software - Laptop: Acer Aspire A14-52MT - BIOS: V1.02, 2025-01-06 - Audio controller: Intel Lunar Lake-M HD Audio Controller `[8086:a828]` - Graphics controller used for HDMI: Intel Lunar Lake `[8086:64a0]`, `xe` driver - Audio driver: `sof-audio-pci-intel-lnl` - Analog codec: Realtek ALC245 - Ubuntu: 24.04.4 LTS (Noble) - Bad kernel: `7.0.0-28-generic` (`7.0.0-28.28~24.04.1`) - Good kernel: `6.17.0-40-generic` (`6.17.0-40.40~24.04.1`) - SOF firmware: `2.14.1.1` - Topology: `intel/sof-ipc4-tplg/sof-hda-generic-2ch.tplg` ### Steps to reproduce 1. Boot Ubuntu with `7.0.0-28-generic`. 2. Select `sof-hda-dsp Speaker + Headphones` or the HDMI output. 3. Play normal desktop audio or run: `speaker-test -D hw:0,0 -c 2 -r 48000 -F S16_LE -t wav -l 1` For HDMI: `speaker-test -D hw:0,3 -c 2 -r 48000 -F S16_LE -t wav -l 1` 4. Observe that playback completes without an ALSA error but no sound is heard. 5. Reboot into `6.17.0-40-generic` and repeat the test. 6. Audio works normally. ### Expected result Audio is audible from the selected HDMI or analog output with `7.0.0-28-generic`, as it is with `6.17.0-40-generic`. ### Actual result All physical audio outputs are silent with `7.0.0-28-generic`. ### Diagnostic observations - `wpctl status` exposes all expected sinks on both kernels. - The HDMI monitor is detected with a valid ELD and stereo LPCM support. - `Master`, `Headphone`, `Speaker`, and the relevant IEC958 playback switches are enabled. - Direct ALSA tests and PipeWire-targeted tests are both silent on 7.0. - The same installed SOF firmware, topology, ALSA UCM configuration, monitor, cable, and user-space audio stack are used on both boots. - The kernel initialization logs do not show an obvious audio error and are nearly identical, making the good/bad kernel comparison important. - Reproducibility: 100% in the tested boots. 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