Lost audio output (speakers) on Sarien after kernel update from 6.11.4-2 to 6.11.4-5

My Dell Latitude 5400 Chromebook (Sarien) is happily chugging along running CachyOS for several months now. Everything works on this unit, until today when I ran pacman -Syu and updated linux-cachyos (6.11.4-2 -> 6.11.4-5).

I didn’t find anything in the logs that would suggest issue with the audio subsystem, but I’m ready to provide the logs to help troubleshooting this issue.

The system:

System:
  Host: L5400C Kernel: 6.11.4-5-cachyos arch: x86_64 bits: 64
  Desktop: Cinnamon v: 6.2.9 Distro: CachyOS
Machine:
  Type: Laptop System: Dell product: Sarien v: rev17 serial: ---  Mobo: Dell model: Sarien v: rev17 serial: ---
    UEFI: coreboot v: Google_Sarien.12200.222.0 date: 07/29/2020
Battery:
  ID-1: BAT0 charge: 24.7 Wh (81.5%) condition: 30.3/42.0 Wh (72.1%)
    volts: 11.6 min: 11.4
CPU:
  Info: quad core model: Intel Core i5-8265U bits: 64 type: MT MCP cache:
    L2: 1024 KiB
  Speed (MHz): avg: 400 min/max: 400/3900 cores: 1: 400 2: 400 3: 400 4: 400
    5: 400 6: 400 7: 400 8: 400
Graphics:
  Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] driver: i915 v: kernel
  Device-2: Realtek Integrated_Webcam_HD driver: uvcvideo type: USB
  Display: unspecified server: X.Org v: 21.1.13 with: Xwayland v: 24.1.3
    driver: X: loaded: modesetting dri: iris gpu: i915 resolution: 1: N/A
    2: 1920x1080~60Hz
  API: EGL v: 1.5 drivers: iris,swrast platforms: gbm,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 24.2.5-cachyos1.2
    renderer: Mesa Intel UHD Graphics 620 (WHL GT2)
  API: Vulkan v: 1.3.295 drivers: intel surfaces: xcb,xlib
Audio:
  Device-1: Intel Cannon Point-LP High Definition Audio driver: snd_hda_intel
  API: ALSA v: k6.11.4-5-cachyos status: kernel-api
Network:
  Device-1: Intel Cannon Point-LP CNVi [Wireless-AC] driver: iwlwifi
  IF: wlan0 state: up mac: 8c:55:4a:---
  Device-2: Intel Ethernet I219-V driver: e1000e
  IF: enp0s31f6 state: down mac: 74:78:27:---
Bluetooth:
  Device-1: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) driver: btusb
    type: USB
  Report: btmgmt ID: hci0 state: up address: 8C:55:4A:--- bt-v: 5.1
Drives:
  Local Storage: total: 953.87 GiB used: 188.24 GiB (19.7%)
  ID-1: /dev/nvme0n1 vendor: Samsung model: ---
    size: 953.87 GiB
Partition:
  ID-1: / size: 120 GiB used: 26.34 GiB (21.9%) fs: btrfs dev: /dev/nvme0n1p14
  ID-2: /boot size: 2 GiB used: 208.9 MiB (10.2%) fs: vfat
    dev: /dev/nvme0n1p13
  ID-3: /home size: 120 GiB used: 26.34 GiB (21.9%) fs: btrfs
    dev: /dev/nvme0n1p14
  ID-4: /var/log size: 120 GiB used: 26.34 GiB (21.9%) fs: btrfs
    dev: /dev/nvme0n1p14
  ID-5: /var/tmp size: 120 GiB used: 26.34 GiB (21.9%) fs: btrfs
    dev: /dev/nvme0n1p14
Swap:
  ID-1: swap-1 type: zram size: 31.22 GiB used: 0 KiB (0.0%) dev: /dev/zram0
Sensors:
  System Temperatures: cpu: 44.0 C pch: 42.0 C mobo: N/A
  Fan Speeds (rpm): N/A
Info:
  Memory: total: 32 GiB available: 31.22 GiB used: 4.56 GiB (14.6%)
    igpu: 64 MiB
  Processes: 269 Uptime: 11h 46m Shell: cachyos-bugrepo inxi: 3.3.36

There is no audio coming out of the laptop speakers since the update. The audio isn’t muted. I was wondering what could have changed from 6.11.4-2 to 6.11.4-5? Reverting back via btrfs snapshots brings back audio output to the speakers.

Could someone help me with this issue?

Yes, it seems that way, but mine didn’t occur after the second reboot. It started working again when I restored the backup, via live boot, that snapper created when I restored an earlier snapshot.

This is strange. Wish I could get to the bottom of the issue, but for now audio output to speakers is working again in 6.11.4-5 for this unit. I’m a happy camper once more. :wink: