Public bug reported:
[ Impact ]
Users running Ubuntu on newer Lenovo Yoga Pro 7 laptops experience critical
audio subsystem degradation.
The three primary failure points are:
* Critically Low Speaker Volume: Sound output through the built-in
speaker array is barely audible, even when userspace volume sliders are
set to 100%. While the host Realtek ALC287 codec initializes, its
companion Cirrus Logic CS35L56 smart amplifiers default to an
uncalibrated, low-power fallback state ("FIRMWARE_MISSING") because the
system lacks their manufacturer-supplied hardware-tuning profiles.
* Non-Functional Speaker-Mute Keyboard LED: Pressing the F1 Audio Mute
key on the keyboard toggles the stream status within PulseAudio/PipeWire
correctly, but the physical amber LED hardware indicator on the keycap
fails to illuminate. The software mute state is disconnected from the
motherboard's GPIO controller.
* Missing/Dead Microphone Array: The system completely fails to register
or capture audio via the internal digital microphone array. The default
driver stack attempts to locate the DMIC components on a digital sub-
link connected directly to the main processor's AMD ACP block, whereas
Lenovo routed the microphone hardware channels through the primary
Realtek codec pins.
[ Fix ]
* Kernel Driver Fixes
- fc12cf16df9a ("ASoC: amd: acp: Add DMI quirk for Lenovo Yoga Pro 7 15ASH11")
- 83dca2530fb3 ("ALSA: hda/realtek: ALC269 fixup for Lenovo Yoga Pro 7
15ASH111 audio")
- Still in linux-next tree. ("ALSA: hda/realtek:ALC269 fixup for Yoga Pro 7
15ASH11 mic mute LED")
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=17065203e1bc7e7f2786998d532cd93a06265156
* Firmware Environment Fixes
- d33a9c6d7661 ("cirrus: cs35l56: Update firmware for Cirrus Amps for a
couple of Lenovo laptops")
[ Test Plan ]
Install the patched kernel package and updated linux-firmware payload on an
affected Lenovo Yoga Pro 7, then reboot to check:
1. Verify Amp Calibration & Speaker Volume:
Play an audio stream at a standard volume level (30–50%). Confirm it produces
crisp, loudly scaled audio.
2. Verify Microphone Capture:
Open Ubuntu Settings -> Sound -> Input. Confirm that the ghost "Digital
Microphone" tied to the AMD ACP is gone, and a functioning Internal Stereo
Microphone device is present.
Speak or tap on the chassis to confirm that the input visualizer bar responds
dynamically to incoming audio data.
3 Verify Mute LED and Mic LED Illumination:
Press the physical F1/F4 Mute hotkey. The amber LED light on the keycap must
illuminate immediately when muted, and cleanly shut off as soon as the system
is unmuted.
[ Where problems could occur ]
Scope of Regression: Extremely isolated. All changes are heavily guarded behind
rigid DMI string check loops inside vendor-specific sub-drivers (AMD ACP
matching tables, Realtek HDA quirk lists, and specific sub-hardware ID firmware
loading paths). Systems built by other vendors (such as Dell, HP, or ASUS) or
other laptop lines will bypass these conditional rules entirely.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Tags: jira-sutton-5252 oem-priority
** Description changed:
[ Impact ]
- Users running Ubuntu on newer Lenovo Yoga Pro 7 laptops experience critical
audio subsystem degradation.
+ Users running Ubuntu on newer Lenovo Yoga Pro 7 laptops experience critical
audio subsystem degradation.
The three primary failure points are:
* Critically Low Speaker Volume: Sound output through the built-in
speaker array is barely audible, even when userspace volume sliders are
set to 100%. While the host Realtek ALC287 codec initializes, its
companion Cirrus Logic CS35L56 smart amplifiers default to an
uncalibrated, low-power fallback state ("FIRMWARE_MISSING") because the
system lacks their manufacturer-supplied hardware-tuning profiles.
* Non-Functional Speaker-Mute Keyboard LED: Pressing the F1 Audio Mute
key on the keyboard toggles the stream status within PulseAudio/PipeWire
correctly, but the physical amber LED hardware indicator on the keycap
fails to illuminate. The software mute state is disconnected from the
motherboard's GPIO controller.
* Missing/Dead Microphone Array: The system completely fails to register
or capture audio via the internal digital microphone array. The default
driver stack attempts to locate the DMIC components on a digital sub-
link connected directly to the main processor's AMD ACP block, whereas
Lenovo routed the microphone hardware channels through the primary
Realtek codec pins.
[ Fix ]
* Kernel Driver Fixes
- - fc12cf16df9a ("ASoC: amd: acp: Add DMI quirk for Lenovo Yoga Pro 7
15ASH11")
- - 83dca2530fb3 ("ALSA: hda/realtek: ALC269 fixup for Lenovo Yoga Pro 7
15ASH111 audio")
- - Still in linux-next tree. ("ALSA: hda/realtek:ALC269 fixup for Yoga Pro 7
15ASH11 mic mute LED")
-
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=17065203e1bc7e7f2786998d532cd93a06265156
+ - fc12cf16df9a ("ASoC: amd: acp: Add DMI quirk for Lenovo Yoga Pro 7
15ASH11")
+ - 83dca2530fb3 ("ALSA: hda/realtek: ALC269 fixup for Lenovo Yoga Pro 7
15ASH111 audio")
+ - Still in linux-next tree. ("ALSA: hda/realtek:ALC269 fixup for Yoga Pro 7
15ASH11 mic mute LED")
+
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=17065203e1bc7e7f2786998d532cd93a06265156
* Firmware Environment Fixes
- - d33a9c6d7661 ("cirrus: cs35l56: Update firmware for Cirrus Amps for a
+ - d33a9c6d7661 ("cirrus: cs35l56: Update firmware for Cirrus Amps for a
couple of Lenovo laptops")
[ Test Plan ]
Install the patched kernel package and updated linux-firmware payload on an
affected Lenovo Yoga Pro 7, then reboot to check:
1. Verify Amp Calibration & Speaker Volume:
- Play an audio stream at a standard volume level (30–50%). Confirm it
produces crisp, loudly scaled audio.
+ Play an audio stream at a standard volume level (30–50%). Confirm it
produces crisp, loudly scaled audio.
2. Verify Microphone Capture:
- Open Ubuntu Settings -> Sound -> Input. Confirm that the ghost "Digital
Microphone" tied to the AMD ACP is gone, and a functioning Internal Stereo
Microphone device is present.
- Speak or tap on the chassis to confirm that the input visualizer bar
responds dynamically to incoming audio data.
+ Open Ubuntu Settings -> Sound -> Input. Confirm that the ghost "Digital
Microphone" tied to the AMD ACP is gone, and a functioning Internal Stereo
Microphone device is present.
+ Speak or tap on the chassis to confirm that the input visualizer bar
responds dynamically to incoming audio data.
3 Verify Mute LED and Mic LED Illumination:
- Press the physical F1/F4 Mute hotkey. The amber LED light on the keycap
must illuminate immediately when muted, and cleanly shut off as soon as the
system is unmuted.
+ Press the physical F1/F4 Mute hotkey. The amber LED light on the keycap
must illuminate immediately when muted, and cleanly shut off as soon as the
system is unmuted.
[ Where problems could occur ]
- * Scope of Regression: Extremely isolated. All changes are heavily guarded
behind rigid DMI string check loops inside vendor-specific sub-drivers (AMD ACP
matching tables, Realtek HDA quirk lists, and specific sub-hardware ID firmware
loading paths). Systems built by other vendors (such as Dell, HP, or ASUS) or
other laptop lines will bypass these conditional rules entirely.
+ Scope of Regression: Extremely isolated. All changes are heavily guarded
behind rigid DMI string check loops inside vendor-specific sub-drivers (AMD ACP
matching tables, Realtek HDA quirk lists, and specific sub-hardware ID firmware
loading paths). Systems built by other vendors (such as Dell, HP, or ASUS) or
other laptop lines will bypass these conditional rules entirely.
** Also affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Tags added: jira-sutton-5252 oem-priority
** Summary changed:
- Enable Realtek ALC287 + Cirrus CS35L56 Audio for Lenovo Yoga Pro 7
+ [SRU]Enable Realtek ALC287 + Cirrus CS35L56 Audio for Lenovo Yoga Pro 7
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https://bugs.launchpad.net/bugs/2156867
Title:
[SRU]Enable Realtek ALC287 + Cirrus CS35L56 Audio for Lenovo Yoga Pro
7
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