Lenovo Yoga Pro 7 14IMH9 - Linux Audio Volume Fix

TL;DR: The kernel incorrectly maps PCI SSID 17aa:3847 to a Legion laptop fixup instead of the correct Yoga fixup. This causes volume control to be completely non-functional. The fix requires rebuilding a single kernel module with a one-line patch.

Affected Hardware

• Model: Lenovo Yoga Pro 7 14IMH9
• DMI product name: 83E2
• CPU: Intel Core Ultra 7 155H (Meteor Lake)
• Audio codec: Realtek ALC287
• PCI SSID: 17aa:3847
• Tested on: Linux Mint 22 / Ubuntu 24.04 Noble, kernel 6.14.0-29-generic (HWE)

May also affect other distributions using the same kernel series.

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Symptom

Volume controll does not work - audio is either completely silent (0%) or at maximum volume regardless of the slider position from 1% to 100%. Above 100% (PipeWire software boost) the volume changes slightly, but this is not real hardware volume control

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Root Cause

In the Linux kernel quirk table (sound/pci/hda/patch_realtek.c), SSID 17aa:3847 is incorrectly assigned to the Legion 7 16ACHG6:

SND_PCI_QUIRK(0x17aa, 0x3847, "Legion 7 16ACHG6", ALC287_FIXUP_LEGION_16ACHG6),

The same SSID is used by the Yoga Pro 7 14IMH9, which requires a different fixup:

ALC287_FIXUP_YOGA9_14IMH9_BASS_SPK_PIN

Technically, pin 0x17 (bass speakers) gets connected to DAC 0x06*, which has no volume control. The correct Yoga fixup redirects the connection to DAC 0x02, which has a full volume control path.

The Legion fixup instead tries to initialize an external I2C amplifier CLSA0100, which is not present on the Yoga Pro 7.

What Does NOT Work

Approach	Result
options snd_hda_codec_realtek model=...	Ignored by the SOF stack
options snd_sof_intel_hda_common hda_model=...	Does not override SSID-based fixup
options snd_hda_codec_realtek patch=...	Ignored by SOF
options snd_hda_codec_realtek quirk_id=...	Parameter not supported by the module
hdajackretask	Blocked by SOF (/sys/class/sound/hwC0D0/reconfig: Device or resource busy)
I2C script (as used for Yoga Pro 9i 16IMH9)	Not applicable - the 14IMH9 has no external I2C amplifier

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Fix: Rebuild the Kernel Module with a One-Line Patch

Only the snd_hda_codec_realtek module is rebuilt - the kernel itself is not touched.

1. Install Build Tools

sudo apt install build-essential libelf-dev linux-headers-$(uname -r) zstd

2. Create a Working Directory and Download Sources

mkdir ~/audio-fix && cd ~/audio-fix

# Download the main source file
curl -o patch_realtek.c "https://raw.githubusercontent.com/torvalds/linux/v6.14/sound/pci/hda/patch_realtek.c"

# Download all required headers and helper files
curl -s "https://api.github.com/repos/torvalds/linux/contents/sound/pci/hda?ref=v6.14" | \
grep '"name"' | grep -E '\.(c|h)"' | sed 's/.*"name": "//;s/".*//' | \
while read f; do
    curl -s -o "$f" "https://raw.githubusercontent.com/torvalds/linux/v6.14/sound/pci/hda/$f"
    echo "Downloaded: $f"
done

3. Apply the Patch

sed -i 's/SND_PCI_QUIRK(0x17aa, 0x3847, "Legion 7 16ACHG6", ALC287_FIXUP_LEGION_16ACHG6)/SND_PCI_QUIRK(0x17aa, 0x3847, "Yoga Pro 7 14IMH9", ALC287_FIXUP_YOGA9_14IMH9_BASS_SPK_PIN)/' patch_realtek.c

# Verify
grep "0x3847" patch_realtek.c
# Expected: SND_PCI_QUIRK(0x17aa, 0x3847, "Yoga Pro 7 14IMH9", ALC287_FIXUP_YOGA9_14IMH9_BASS_SPK_PIN),

4. Create the Makefile

cat > Makefile << 'EOF'
obj-m := snd_hda_codec_realtek.o
snd_hda_codec_realtek-objs := patch_realtek.o

KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

all:
	$(MAKE) -C $(KDIR) M=$(PWD) modules

clean:
	$(MAKE) -C $(KDIR) M=$(PWD) clean
EOF

5. Build the Module

make

6. Backup and Install

# Backup the original module
sudo cp /lib/modules/$(uname -r)/kernel/sound/pci/hda/snd-hda-codec-realtek.ko.zst \
        /lib/modules/$(uname -r)/kernel/sound/pci/hda/snd-hda-codec-realtek.ko.zst.bak

# Compress and install the patched module
zstd snd_hda_codec_realtek.ko -o snd_hda_codec_realtek.ko.zst -f

sudo cp snd_hda_codec_realtek.ko.zst \
        /lib/modules/$(uname -r)/kernel/sound/pci/hda/snd-hda-codec-realtek.ko.zst

sudo depmod -a
sudo reboot

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Rollback

If something goes wrong, restore the original module:

sudo cp /lib/modules/$(uname -r)/kernel/sound/pci/hda/snd-hda-codec-realtek.ko.zst.bak \
        /lib/modules/$(uname -r)/kernel/sound/pci/hda/snd-hda-codec-realtek.ko.zst

sudo depmod -a
sudo reboot

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After a Kernel Update

When the kernel is updated, the module will be replaced with the original. Rebuild the patched version:

cd ~/audio-fix
make clean && make
zstd snd_hda_codec_realtek.ko -o snd_hda_codec_realtek.ko.zst -f
sudo cp snd_hda_codec_realtek.ko.zst \
        /lib/modules/$(uname -r)/kernel/sound/pci/hda/snd-hda-codec-realtek.ko.zst
sudo depmod -a
sudo reboot

Note: If the kernel version changes (e.g. from 6.14 to 6.15), update the source URL - replace v6.14 with the correct version tag.

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Verify the Fix

# Pin 0x17 should now use DAC 0x02, not 0x06
cat /proc/asound/card0/codec#0 | grep -A15 "Node 0x17"
# Look for: Connection: ... 0x02* (asterisk on 0x02, not 0x06)

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Upstream Fix

This is a kernel bug - the SSID 17aa:3847 is shared between the Legion 7 16ACHG6 and the Yoga Pro 7 14IMH9, but only the Legion entry exists in patch_realtek.c. The proper fix would be to submit a patch to the upstream Linux kernel adding the correct quirk entry for the Yoga Pro 7 14IMH9

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Related Resources

• Yoga Pro 9i Gen 9 Linux guide - similar hardware, different model
• kernel bugzilla #217449 - related SOF audio issues on Lenovo Yoga