On Wed, 14 Feb 2018 13:29:39 +0100,
Benjamin Berg wrote:
> 
> The internal mic boost on the T480 is too high. Fix this by applying the
> ALC269_FIXUP_LIMIT_INT_MIC_BOOST fixup to the machine to limit the gain.
> 
> Signed-off-by: Benjamin Berg <bb...@redhat.com>
> Tested-by: Benjamin Berg <bb...@redhat.com>

Applying this quirk itself is OK, but just wonder whether this model
has a docking station port.  Recently we fixed the dock issue, and it
required to apply ALC298_FIXUP_TPT470_DOCK.


thanks,

Takashi

> ---
>  sound/pci/hda/patch_realtek.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
> index ce28f7ce64e6..8467ce3db767 100644
> --- a/sound/pci/hda/patch_realtek.c
> +++ b/sound/pci/hda/patch_realtek.c
> @@ -6510,6 +6510,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
>       SND_PCI_QUIRK(0x17aa, 0x224b, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
>       SND_PCI_QUIRK(0x17aa, 0x224c, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
>       SND_PCI_QUIRK(0x17aa, 0x224d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
> +     SND_PCI_QUIRK(0x17aa, 0x225d, "Thinkpad T480", 
> ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
>       SND_PCI_QUIRK(0x17aa, 0x30bb, "ThinkCentre AIO", 
> ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY),
>       SND_PCI_QUIRK(0x17aa, 0x30e2, "ThinkCentre AIO", 
> ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY),
>       SND_PCI_QUIRK(0x17aa, 0x310c, "ThinkCentre Station", 
> ALC294_FIXUP_LENOVO_MIC_LOCATION),
> -- 
> 2.14.3
> 
> 

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