FWIW: dmesg | grep -Pi "alsa|pulse|sound|audio" ... for 5.11 and 5.14 differ.
5.11.0-46-generic (works) [ 0.136592] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) [ 3.051445] i915 0000:00:02.0: [drm] HDaudio controller not detected, using LPE audio instead [ 10.791703] input: Intel HDMI/DP LPE Audio HDMI/DP,pcm=0 as /devices/pci0000:00/0000:00:02.0/hdmi-lpe-audio/sound/card0/input7 [ 10.791913] input: Intel HDMI/DP LPE Audio HDMI/DP,pcm=1 as /devices/pci0000:00/0000:00:02.0/hdmi-lpe-audio/sound/card0/input8 [ 14.393209] input: bytcr-rt5640 Headset as /devices/platform/80860F28:00/bytcr_rt5640/sound/card1/input13 5.14.0-1032-oem (does not work) [ 0.137603] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) [ 2.685353] i915 0000:00:02.0: [drm] HDaudio controller not detected, using LPE audio instead [ 10.499073] input: Intel HDMI/DP LPE Audio HDMI/DP,pcm=0 as /devices/pci0000:00/0000:00:02.0/hdmi-lpe-audio/sound/card0/input7 [ 10.499283] input: Intel HDMI/DP LPE Audio HDMI/DP,pcm=1 as /devices/pci0000:00/0000:00:02.0/hdmi-lpe-audio/sound/card0/input8 [ 10.721966] sof-audio-acpi-intel-byt 80860F28:00: Detected Baytrail-CR platform [ 10.722520] sof-audio-acpi-intel-byt 80860F28:00: Detected Baytrail-CR platform [ 10.762200] sof-audio-acpi-intel-byt 80860F28:00: Firmware info: version 1:6:0-e9637 [ 10.762213] sof-audio-acpi-intel-byt 80860F28:00: Firmware: ABI 3:17:0 Kernel ABI 3:18:0 [ 13.861454] sof-audio-acpi-intel-byt 80860F28:00: Topology: ABI 3:17:0 Kernel ABI 3:18:0 [ 13.927618] sof-audio-acpi-intel-byt 80860F28:00: ASoC: Parent card not yet available, widget card binding deferred [ 13.977639] input: sof-bytcht rt5640 Headset as /devices/platform/80860F28:00/bytcr_rt5640/sound/card1/input13 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta-hwe-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/1958410 Title: bytcr_rt5640 sound not working with kernel >= 5.13 Status in linux-meta-hwe-5.13 package in Ubuntu: Confirmed Status in linux-meta-hwe-5.15 package in Ubuntu: New Bug description: Using the built in speakers on a Linx 1010b. The 5.11 kernel works fine, but 5.13 and 5.14 fail. The card, when working is seen in alsa-info as bytcrrt5640,bytcr- rt5640, whereas in the later (hwe-20.04-edge, oem-20.04d) kernels where it fails, it is seen as "rt5640,sof-bytcht rt5640" When failing, speaker-test, spd-say, and most other sound sources seem to get 'sunk', and the level meter on the pulse mixer shows activity. FWIW "espeak-ng hello" blocks on the broken setup. I confess I'm not actually using the linux-meta-hwe-5.13 as it is unavailable in LinuxMint. I am using linux-generic-hwe-20.04-edge, which AFAICT pulls in the same kernels. apt policy pointed me to report here. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta-hwe-5.13/+bug/1958410/+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
