> today I realized that the built-in microphone (next to the webcam) > of my Fujitsu Lifebook U-series is not detected. (I usully use a > headset, but due to travelling was forced to use the internal). > > I tried hard to get this device working, but neither with my > self-compiled kernel (5.15.6) nor the Debian kernel distribution kernel > 5.15 the microphone seems to be detected. > > I booted into Windows and tried to find out what the device might be. My > **guess** is what is mentioned as > Intel Smart Sound Technology > with > Vendor ID 8086 > Device ID ae20 > I git grepped the kernel sources for this, and snd-hda-intel contains > quite some mentioning about Vendor ID 8086, but ae20 is not appearing. I checked in our internal sources and while I do see a 'DMIC_DEVICE_ID' 0xAE20, this is not related to PCI and that's not what is used to probe a driver. if you are looking at Windows, the string you want to look for starts with 'CTLR_DEV_', not 'DEV_' > Now the interesting thing is that booting into linux and using lspci and > lsusb, I cannot see a single device with the above specifications: > > lspci: > root@sakefilet /usr/src/git/linux/Documentation # lspci [...] > 00:1f.3 Multimedia audio controller: Intel Corporation Comet Lake PCH-LP cAVS This is the one you want details on. please share the results of: cat /sys/bus/pci/devices/0000\:00\:1f.3/device cat /sys/bus/pci/devices/0000\:00\:1f.3/class and sudo lspci -vvv -s 00:1f.3
