Public bug reported:
Internal speakers on Apple iMac19,1 (2019) produce no audio output under Ubuntu
24.04.4 LTS (kernel 6.8.0-100-generic).
Hardware: Cirrus Logic CS8409 codec (Vendor ID: 0x10138409, Subsystem:
0x106b1000)
Issue: Audio hardware detected, all services running correctly (PipeWire,
WirePlumber, ALSA), but no sound from built-in speakers. GPIO pin 4 (speaker
amplifier control) stuck at data=0 and cannot be activated.
Tested without success:
Kernel module parameters: model=imac27, mbp101, imac27_122, auto, generic
Manual GPIO activation via hda-verb
Multiple kernel versions (6.8.0-100, 6.17.0-14)
hdajackretask pin configuration
Third-party Apple hardware drivers
Root cause: Missing kernel support for GPIO initialization specific to
iMac19,1 with CS8409 codec.
Attached Files
ubuntu-sound-bug-report.md - Full technical details
Thanks for looking into this.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "ubuntu-sound-bug-report.md"
https://bugs.launchpad.net/bugs/2141772/+attachment/5945833/+files/ubuntu-sound-bug-report.md
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https://bugs.launchpad.net/bugs/2141772
Title:
no sound via internal speakers
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