Public bug reported: This is my first kernel bug report, so I apologize if my terminology isn't perfect, but I have done a lot of testing to isolate this issue.
Hardware: Intel N95 Laptop (Dixmau brand), ES8336 Codec (ACPI ID: ESSX8336). OS: Xubuntu 26.04.1 LTS (Kernel 7.0.0). The Issue: On this kernel, the first audio stream after boot works perfectly. However, when that stream stops, the hardware goes into a sleep state and fails to wake up. The next audio stream is completely silent. The volume meters move, but no sound comes out. Only a full reboot fixes it. Historical Context (24.04.5 LTS): On the previous LTS, this hardware wasn't recognized at all out of the box (it only showed "Dummy Output"). I had to manually force the system to recognize the ES8336 card. Once forced, it worked perfectly across multiple streams. It seems the new kernel recognizes the card better, but the new power management is breaking it. The Evidence (Raw ALSA Test): To prove this wasn't just a PipeWire/software issue, I stopped the audio services entirely and used raw ALSA (speaker-test -D plughw:0,0). The test produced silence after the failure, proving the hardware is stuck at the kernel level, not in the user software. lsmod confirms the snd_soc_es8336 driver is loaded. The Workaround: To stop the hardware from sleeping and breaking, I run a silent audio stream in the background. Keeping the device "awake" prevents the deadlock: pacat --playback --device=alsa_output.pci-0000_00_1f.3-platform-sof-essx8336.stereo-fallback /dev/zero Full Transparency: I used an AI assistant to help me parse the terminal logs, understand the power-management issue and structure this description. The full, unedited debugging process, command history, and AI disclosure are documented here: https://github.com/abdellahi-beirouck/linux-audio-debugging ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2172674 Title: ES8336 codec audio stops after first stream (Hardware fails to wake up on Kernel 7.0.0) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2172674/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
