Thanks for the explanations. I'll keep working with pulseaudio+ucm for now so as to be able to test your fixes. If it becomes too unbearable I'll revert to dmic_detect=0 >About the issue on google meet, it is a problem, do you also meet the similar issue on other audio apps? Regarding the microphone issue, it seems to be chromium specific, possibly related to the fact that chromium is a snap and is therefore sandboxed. here is the corresponding dmesg trace : [24350.178216] sof-audio-pci 0000:00:1f.3: error: no reply expected, received 0x0 [24350.270480] sof-audio-pci 0000:00:1f.3: firmware boot complete [24354.651222] input: 2C:41:A1:47:C5:93 as /devices/virtual/input/input24 [24354.693912] audit: type=1107 audit(1585155460.615:229): pid=1284 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="CheckPermissions" name=":1.8" mask="receive" pid=8453 label="snap.spotify.spotify" peer_pid=1291 peer_label="unconfined" exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?' [24354.930070] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24354.940107] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24354.940110] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24354.940110] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24364.030170] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24364.030176] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24364.030177] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.009964] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.009968] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.019991] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.019995] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.019996] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.094089] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.094093] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.094095] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.244985] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.244988] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.244989] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.254999] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.255003] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.255004] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.467006] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.467011] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.467012] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.467014] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.477005] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.522114] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.522117] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.748003] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.748012] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.748013] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.758019] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.758025] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24365.842064] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24365.842067] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.023968] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.023972] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.034004] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.034008] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.034010] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.295004] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.295009] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.304979] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.304982] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.304983] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.338045] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.338048] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.338049] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.426008] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.426014] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.426015] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.426017] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.436001] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.486082] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.486086] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.599985] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.599989] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.599990] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.609983] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.650074] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.796984] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.796987] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.796989] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.806998] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.807002] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.807003] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.866041] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.866044] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.866045] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24366.983974] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.983978] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.983979] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.993992] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.993997] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24366.993998] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.090095] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24367.233980] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.233984] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.243990] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.243995] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.302095] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24367.302099] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24367.302100] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24367.462007] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.462011] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.462012] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.471985] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.471988] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.518071] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24367.518073] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24367.719987] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.719991] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.719992] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.729950] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.729970] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24367.729971] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.152945] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.152949] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.152950] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.162982] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.453979] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.453988] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.463978] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.463988] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.463991] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.610106] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24368.610111] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24368.610113] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24368.905985] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.905993] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.915980] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24368.915988] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.070106] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24369.070114] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24369.292970] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.292975] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.302970] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.302974] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.302975] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.312975] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.386013] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24369.588945] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.588950] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.598956] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.598960] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.698067] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24369.698071] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24369.698073] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24369.897956] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.897961] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.907949] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.907953] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.907955] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24369.917952] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.010082] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24370.010088] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24370.253929] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.253933] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.263970] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.263975] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.263977] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.370028] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24370.708933] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.708938] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.718924] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.718928] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.718930] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.728966] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24370.841981] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24371.185935] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.185937] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.185938] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.195946] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.195949] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.195951] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.298011] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24371.298024] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24371.458958] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.468932] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.468935] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.468936] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.478949] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.761918] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.761922] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.771922] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.771928] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.771930] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24371.845988] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24372.043937] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.043940] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.043941] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.043942] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.053927] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.314960] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.314964] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.314965] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.324912] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.430010] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24372.430014] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24372.430016] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24372.617924] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.617929] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.617930] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.627921] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.627926] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.627928] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.893922] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.893931] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.903934] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.903947] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24372.903948] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.108926] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.118928] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.118932] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.118933] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.118933] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.193969] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24373.193973] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24373.193975] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24373.322902] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.322908] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.322910] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.322911] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.332938] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.332942] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.401972] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24373.593936] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.593942] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.593944] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.603924] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.603930] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.838911] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.838917] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.848908] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.848912] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.848913] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24373.913955] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24374.039909] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.039913] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.039915] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.049897] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.101951] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24374.277930] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.277934] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.277935] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.287887] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.287892] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.338051] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24374.338057] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24374.338060] Bluetooth: hci0: SCO packet for unknown connection handle 257 [24374.452923] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.452928] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.452929] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.462889] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.462893] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.462894] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.677995] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.677999] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.678001] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.792928] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.792932] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.818158] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.818163] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.975915] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.975925] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.975927] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.985895] Bluetooth: hci0: SCO packet for unknown connection handle 0 [24374.985902] Bluetooth: hci0: SCO packet for unknown connection handle 0 Using the exact same testcase on firefox, starting the visio correctly switched to the headset microphone, becoming presenter didn't trigger the input/output looping nor this huge dmesg trace.