This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1864400 Title: alsa/asoc: export the number of dmic to userspace to work with the latest ucm2 (focal) Status in linux package in Ubuntu: Incomplete Bug description: [Impact] In the ubuntu 20.04, we plan to integrate alsa-ucm-conf-v1.2.1.2 or alsa-ucm-conf-v1.2.2, in the ucm2, adding a new element to tell pulseaudo the number of dmics on this machine, this needs kernel to export the number via component. Without these 2 patches, the pulseaudio will fail to initialize on Lenovo X1 Carbon since this machine has 4 dmics. [Fix] Backported the patches from mainline kernel v5.6-c1 [Test Case] Install the sof-firmware v1.4.2 Install the master branch of alsa-ucm-conf (focal will integrate it too) Install the master branch of pulseaudio (focal will integrate it too) boot the kernel with these patches, check the gnome-control-center, all audio function work well. [Regression Risk] Low, the patches are backported from upstream kernel, and I tested this patch on Lenovo and Dell dmic machines. And after merging these 2 patches, the kernel still could work with old firmware and ucm. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1864400/+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
