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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Dell Inspiron 7640 Bottom Speakers Not Working / TAS2781 / ALC3254","articleBody":"My Dell Inspiron 7640 bottom speakers have never worked with any Linux distro. My issue is very similar to #5271 \n\nAs this is my first post with the SOF Project, I'm not sure which information is the best to aid in correcting the bug, but here is some relevant information:\n\n```\nlspci -vnn | grep -A10 -i audio\n0000:00:1f.3 Multimedia audio controller [0401]: Intel Corporation Meteor Lake-P HD Audio Controller [8086:7e28] (rev 20)\n        Subsystem: Dell Device [1028:0c96]\n        Flags: bus master, fast devsel, latency 64, IRQ 242, IOMMU group 15\n        Memory at 501c310000 (64-bit, non-prefetchable) [size=16K]\n        Memory at 501c000000 (64-bit, non-prefetchable) [size=2M]\n        Capabilities: \u003caccess denied\u003e\n        Kernel driver in use: sof-audio-pci-intel-mtl\n        Kernel modules: snd_hda_intel, snd_sof_pci_intel_mtl\n\n0000:00:1f.4 SMBus [0c05]: Intel Corporation Meteor Lake-P SMBus Controller [8086:7e22] (rev 20)\n        Subsystem: Dell Device [1028:0c96]\n        Flags: medium devsel, IRQ 18, IOMMU group 15\n        Memory at 501c31c000 (64-bit, non-prefetchable) [size=256]\n        I/O ports at efa0 [size=32]\n        Kernel driver in use: i801_smbus\n        Kernel modules: i2c_i801\n```\n\n```\ndmesg | grep audio\n[    5.418423] [    T915] sof-audio-pci-intel-mtl 0000:00:1f.3: enabling device (0000 -\u003e 0002)\n[    5.418593] [    T915] sof-audio-pci-intel-mtl 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if 0x040100\n[    5.418638] [    T915] sof-audio-pci-intel-mtl 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])\n[    5.425506] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: use msi interrupt mode\n[    5.460420] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: hda codecs found, mask 5\n[    5.460422] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: using HDA machine driver skl_hda_dsp_generic now\n[    5.460424] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: NHLT device BT(0) detected, ssp_mask 0x4\n[    5.460425] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: BT link detected in NHLT tables: 0x4\n[    5.460426] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: DMICs detected in NHLT tables: 2\n[    5.463129] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: Firmware paths/files for ipc type 1:\n[    5.463131] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3:  Firmware file:     intel/sof-ipc4/mtl/sof-mtl.ri\n[    5.463131] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3:  Firmware lib path: intel/sof-ipc4-lib/mtl\n[    5.463132] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3:  Topology file:     intel/sof-ace-tplg/sof-hda-generic-2ch.tplg\n[    5.463678] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: Loaded firmware library: ADSPFW, version: 2.12.0.1\n[    5.587371] [    T525] sof-audio-pci-intel-mtl 0000:00:1f.3: Booted firmware version: 2.12.0.1\n[    5.617838] [    T876] sof-audio-pci-intel-mtl 0000:00:1f.3: Topology: ABI 3:29:1 Kernel ABI 3:23:1\n[    5.648822] [    T876] snd_hda_codec_realtek ehdaudio0D0: ALC3254: picked fixup  for PCI SSID 1028:0c96\n[    5.648975] [    T876] snd_hda_codec_realtek ehdaudio0D0: bound i2c-TIAS2781:00 (ops tas2781_hda_comp_ops [snd_hda_scodec_tas2781_i2c])\n[    5.649229] [    T876] snd_hda_codec_realtek ehdaudio0D0: autoconfig for ALC3254: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker\n[    5.649233] [    T876] snd_hda_codec_realtek ehdaudio0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)\n[    5.649234] [    T876] snd_hda_codec_realtek ehdaudio0D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)\n[    5.649235] [    T876] snd_hda_codec_realtek ehdaudio0D0:    mono: mono_out=0x0\n[    5.649236] [    T876] snd_hda_codec_realtek ehdaudio0D0:    inputs:\n```","author":{"url":"https://github.com/djmenig","@type":"Person","name":"djmenig"},"datePublished":"2025-05-05T06:31:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/5404/linux/issues/5404"}