This is for eoan. Since focal will use the alsa-lib-1.2.1.2 and it already switch to use ucm2, so this SRU doesn't apply to focal, only for eoan and bionic.
** Patch added: "alsa-lib_1.1.9-0ubuntu1.3.debdiff" https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1868210/+attachment/5339265/+files/alsa-lib_1.1.9-0ubuntu1.3.debdiff ** Also affects: alsa-lib (Ubuntu Eoan) Importance: Undecided Status: New ** Changed in: alsa-lib (Ubuntu Eoan) Status: New => Confirmed ** Changed in: alsa-lib (Ubuntu Eoan) Importance: Undecided => High ** Description changed: [Impact] On some lenovo notebooks, ucm files are not loaded and mic can't be used [Fix] UCM was loaded based on cardlongname, but that can't cover all configs of the same model. Lenovo suggested to load ucm by the first 3 letters of /sys/devices/virtual/dmi/id/bios_version, so that all configs could use just one ucm. [Test Case] + after applying this patch, I installed the testing alsa-lib on lenovo X1C7 and Dell vostro5390 which are all machines with the dmic connected to pch, after booing up, I checked the /usr/share/alsa/ucm/, the LENOVO-BIOSID-xxx folders are there, and the LENOVO machine loaded the N2H/*.conf, it worked well, the Dell machine still loaded the ucm by cardname, it worked as good as before. [Regression Potential] + low, just add some new ucms and let LENOVO machine find the ucm by bios_version if it fails by cardlongname. And already tested the change on lenovo and dell machines. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to alsa-lib in Ubuntu. https://bugs.launchpad.net/bugs/1868210 Title: [SRU] Load ucm on Lenovo notebooks based on bios version Status in alsa-lib package in Ubuntu: Invalid Status in alsa-lib source package in Bionic: Confirmed Status in alsa-lib source package in Eoan: Confirmed Status in alsa-lib source package in Focal: Invalid Bug description: [Impact] On some lenovo notebooks, ucm files are not loaded and mic can't be used [Fix] UCM was loaded based on cardlongname, but that can't cover all configs of the same model. Lenovo suggested to load ucm by the first 3 letters of /sys/devices/virtual/dmi/id/bios_version, so that all configs could use just one ucm. [Test Case] after applying this patch, I installed the testing alsa-lib on lenovo X1C7 and Dell vostro5390 which are all machines with the dmic connected to pch, after booing up, I checked the /usr/share/alsa/ucm/, the LENOVO-BIOSID-xxx folders are there, and the LENOVO machine loaded the N2H/*.conf, it worked well, the Dell machine still loaded the ucm by cardname, it worked as good as before. [Regression Potential] low, just add some new ucms and let LENOVO machine find the ucm by bios_version if it fails by cardlongname. And already tested the change on lenovo and dell machines. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1868210/+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
