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the speakers still hiss. > - Persists across reboots. > > Observations > - dmesg: "ALC287: picked fixup for PCI SSID 17aa:38fc", both CS35L56 amps > bind and load firmware normally. No audio errors. > - Muting either the "Speaker" or the "Bass Speaker" switch silences all > speaker output, so they cannot be used to isolate the noise. > - Auto-Mute Mode is Disabled: speakers keep playing with headphones plugged in. > - Pin routing (/proc/asound/card1/codec#0): > 0x14 (Speaker) -> DAC 0x02 > 0x17 (Bass Speaker) -> DAC 0x03 (same DAC as headphone pin 0x21) > > Not tested: other kernel versions, changing AMP1/AMP2 gain. > > Happy to test patches and provide more output (alsa-info, full codec dump). Could you create a bugzilla on: https://bugzilla.kernel.org/ Attach an alsa-info and make sure to add patches@opensource.cirrus.com to the ticket. Could you check adjusting the "... Speaker Playback Volume" controls manually, would be curious to see if that helps? My gut feeling says this is the I2S setup being slightly off and some quirks are needed on the Realtek side. But that doesn't quite gel with the volume not affecting things. Thanks, Charles