[alsa-devel] No sound on Thinkpad T440s in Docking Station

[Takashi Iwai]

At Wed, 30 Apr 2014 10:56:48 +0200,
Joschi Brauchle wrote:
> 
> Dear all,
> 
> using openSUSE 13.1 on an Thinkpad T440s, I am not getting sound once 
> the laptop is docked to its docking station.
> 
> I suspect an additional SND_PCI_QUIRK is needed for this model.
> "pactl list" returns
> ----------------
> alsa.mixer_name = "Realtek ALC292"
> alsa.components = "HDA:10ec0292,17aa220c,00100001"
> ----------------
> for the analog audio output sink in docked state.
> 
> Hence I assume a new line *similar* to this
> ----------------
> SND_PCI_QUIRK(0x17aa, 0x220c, "Thinkpad T440s", ALC269_FIXUP_LENOVO_DOCK),
> ----------------
> is needed?
> What about the ALC292 instead of 269 Realtek chip...?

It's a compatible chip, so the codec name doesn't matter.
You can try it with model=lenovo-dock option with the recent kernels.
For Haswell, it's safer to pass twice
(model=lenovo-dock,lenovo-dock).

Let us know if this works for you.


Takashi