Last known working kernel: 5.4.0-33, next installable Ubuntu kernel 5.4.0-37 introduces the bug.
I have tested that saving "options snd_hda_intel power_save=0" to a file under /etc/modprobe.d and rebooting to a kernel from -37 onwards is a valid workaround. Lines mentioning ALSA from http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_5.4.0-37.41/changelog: * Focal update: v5.4.40 upstream stable release (LP: #1878040) - ALSA: hda: Match both PCI ID and SSID for driver blacklist * Focal update: v5.4.39 upstream stable release (LP: #1877592) - ALSA: hda/realtek - Two front mics on a Lenovo ThinkCenter - ALSA: usb-audio: Correct a typo of NuPrime DAC-10 USB ID - ALSA: hda/hdmi: fix without unlocked before return - ALSA: line6: Fix POD HD500 audio playback - ALSA: pcm: oss: Place the plugin buffer overflow checks correctly - ALSA: opti9xx: shut up gcc-10 range warning * Focal update: v5.4.37 upstream stable release (LP: #1876765) - ALSA: hda: Release resources at error in delayed probe - ALSA: hda: Keep the controller initialization even if no codecs found - ALSA: hda: Explicitly permit using autosuspend if runtime PM is supported - ALSA: hda: call runtime_allow() for all hda controllers * Focal update: v5.4.36 upstream stable release (LP: #1876361) - ALSA: usb-audio: Add Pioneer DJ DJM-250MK2 quirk - ALSA: hda: Remove ASUS ROG Zenith from the blacklist - ALSA: usb-audio: Add static mapping table for ALC1220-VB-based mobos - ALSA: usb-audio: Add connector notifier delegation - ALSA: usx2y: Fix potential NULL dereference - ALSA: hda/realtek - Fix unexpected init_amp override - ALSA: hda/realtek - Add new codec supported for ALC245 - ALSA: hda/hdmi: Add module option to disable audio component binding - ALSA: usb-audio: Fix usb audio refcnt leak when getting spdif - ALSA: usb-audio: Filter out unsupported sample rates on Focusrite devices * Focal update: v5.4.35 upstream stable release (LP: #1875660) - ALSA: hda: Honor PM disablement in PM freeze and thaw_noirq ops - ALSA: hda: Don't release card at firmware loading error * Support DMIC micmute LED on HP platforms (LP: #1876859) - ALSA: hda/realtek - Introduce polarity for micmute LED GPIO - ALSA: hda/realtek - Enable micmute LED on and HP system - ALSA: hda/realtek - Add LED class support for micmute LED - ALSA: hda/realtek - Fix unused variable warning w/o CONFIG_LEDS_TRIGGER_AUDIO * alsa/sof: kernel oops on the machine without Intel hdmi audio codec (a regression in the asoc machine driver) (LP: #1874359) - SAUCE: ASoC: intel/skl/hda - fix oops on systems without i915 audio codec -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1888992 Title: [Realtek ALC892, Green Headphone Out, Front] Not detecting/switching to front jack after plugging in headphones Status in alsa-driver package in Ubuntu: New Bug description: I boot my system without any sound devices plugged into any jacks; checking Gnome settings Sound, Output Device is "Dummy Output" (no other options available in drop-down list). I plug in headphones into the front jack and play some audio, but do not hear any sound from the headphones; checking Gnome settings Sound, the Output Device is still "Dummy Output", with no other options available. This is a regression from previous behaviour, when plugging in headphones into the front jack would automatically enable/switch to the front jack and its associated controller "Family 17h (Models 00h- 0fh) HD Audio Controller" (this is the motherboard's onboard audio hardware). I can currently workaround this each time I plug in the headphones by installing and running pavucontrol, and under Configuration selecting "Analogue Stereo Output (unplugged) (unavailable)" - this option becomes "Analogue Stereo Output" after I select it. This seems to be a regression in pulseaudio after an upgrade from from 1:13.99.1-1ubuntu3.3 to 1:13.99.1-1ubuntu3.5. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44 Uname: Linux 5.4.0-42-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: chinf 1741 F.... pulseaudio /dev/snd/pcmC1D0p: chinf 1741 F...m pulseaudio /dev/snd/controlC0: chinf 1741 F.... pulseaudio /dev/snd/timer: chinf 1741 f.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun Jul 26 12:46:52 2020 InstallationDate: Installed on 2018-10-29 (635 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic successful Symptom_Card: Family 17h (Models 00h-0fh) HD Audio Controller - HD-Audio Generic Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: chinf 1741 F.... pulseaudio /dev/snd/controlC0: chinf 1741 F.... pulseaudio Symptom_Jack: Green Headphone Out, Front Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: No sound at all Title: [To Be Filled By O.E.M., Realtek ALC892, Green Headphone Out, Front] No sound at all UpgradeStatus: Upgraded to focal on 2020-05-04 (83 days ago) dmi.bios.date: 12/19/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P5.40 dmi.board.name: AB350 Pro4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP5.40:bd12/19/2018:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnAB350Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. 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