APPLIED: [Artful/linux-oem][PATCH v2] system can't detect external microphone with the codec alc274

[Khaled Elmously]

On 2017-11-23 11:46:39 , Hui Wang wrote:
> BugLink: http://bugs.launchpad.net/bugs/1731822
> 
> This is v2, comparing to v1, I add SRU justification template here.
> 
> This patch is only for Artful and OEM kernel.
> 
> This patch is in v4.14-rc, so it will be in the Bionic kernel automatically.
> 
> Neither Xenial kernel nor Zesty kernel supports alc274 well yet, they lack lots
> of functions like setting coefficient for eapd, headset mode, mic_in mode, ctia
> and omtp mode. So only applying this patch is not sufficient to fix this bug.
> 
> 
> [Impact]
> There is a headset jack on this machine, after plugging the headset, the
> headset-mic can't be detected, as a result we can't record sound with this
> mic.
> 
> 
> [Test Case]
> plugging the headset and checking the sound-setting to verify the headset-mic
> shows up. And recording sound with this mic, it works well.
> 
> [Fix]
> adding the pin definition to quirk table, then this machine will be applied
> ALC269_FIXUP_DELL1_MIC_NO_PRESENCE.
> 
> [Regression Potential]
> No, it does not change any existing functions.
> 
> 
> Hui Wang (1):
>   ALSA: hda - fix headset mic problem for Dell machines with alc274
> 
>  sound/pci/hda/patch_realtek.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Already applied to Linux-oem and Artful