On Thu, 16 Mar 2023 07:33:46 +0100, tangmeng wrote: > > > > On 2023/3/16 13:54, Takashi Iwai wrote: > > Too bad. So, if any, further fixes will be a guess work. > > Do you know the codec vendor ID at least? > > > From the information I saved as follows: > > 制造商: Intel Corporation > 型 号: Intel 7 Series/C216 Chipset Family High Definition Audio Controller > > And by my pci.ids comparison, the corresponding should be 8086:1e20 That doesn't help much, unfortunately. The interesting numbers are found rather in /proc/asound/card*/codec* files. I guess the HD-audio codec ID is same among other models, but it should have a unique HD-audio codec subsystem id (SSID) 0x17aaXXXX. And, through skimming over the net, I found that the PCI SSID 17aa:3977 hits a few more other Lenovo models. It implies that applying your change may likely break those others, too. As a consequence, I'm afraid that we'll have to revert your change, while keeping the quirk applicable via the model option. If you need to fix it properly, please check the codec SSID, and use that value instead of PCI SSID 17aa:3977. Takashi