I live-booted from U 21.10*, which has a 5.13.0-19 kernel. Bafflingly, sound test worked from the live system, even though alsa- info shows rt5640,sof-bytcht.
Late now. I'll do it again tomorrow and grab inxi/pactl/alsa-info. *Lost time making a USB boot stick with 32 bit EFI capability. mkusb to the rescue. -- 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: 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
