I can confirm this is currently an issue on the Lenovo X1 Carbon 7th gen. I did some testing with the current 19.10 kernel (5.3.0-18-generic), and posted my results to this github issue for the SOF project [1].
They confirmed this is most likely an issue with the kernel config for Ubuntu. And also posted some suggestions for the required kernel configs to fix this [2]. I also did manual changes to the alsa ucm package, blacklist the snd_hda_intel and snd_soc_skl module and install the topology provided by Lenovo. [1] https://github.com/thesofproject/sof/issues/1885#issuecomment-544252992 [2] https://github.com/thesofproject/sof/issues/1885#issuecomment-544498765 ** Bug watch added: github.com/thesofproject/sof/issues #1885 https://github.com/thesofproject/sof/issues/1885 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1848490 Title: eoan: alsa/sof: Enable SOF_HDA link and codec Status in linux package in Ubuntu: Incomplete Bug description: [Impact] We tested the EOAN kernel on the LENOVO or Dell machines which have dmic directly connnected to PCH, the dmic didn't work. [Fix] We need to enable SOF_HDA link and codec, then the sof driver and Legacy HDA driver work together to make the dmic work. [Test Case] Install the latest 19.10 image, build a new kernel with this patch and replace the existing kernel, After installing the blacklist package (blacklist snd_hda_intel and snd_soc_skl) and ucm package, the dmic and all output devices (speaker/hdmi) work. [Regression Risk] Low, these configs are already enabled in the oem-b-osp1 kernel for a long time, and we tested it on many lenovo/dell machines witch have or have no dmic, all worked well. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1848490/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
