** Description changed: + == Justification == + Commit 648e921888ad96ea3dc922739e96716ad3225d7f (clk: x86: Stop marking clocks as CLK_IS_CRITICAL) backported to Cosmic kernel fixed the bug that keeps unused clocks on, but it is breaking the audio support on some Chromebooks (Swanky / Clapper/ Gnawty) since we were not using + the right clock in the cht_bsw_max98090_ti machine driver. + + == Fix == + a182ecd (ASoC: intel: cht_bsw_max98090_ti: Add quirk for boards + using pmc_plt_clk_0) + 984bfb3 (ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk) + 94ea56c (ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk) + + These 3 patches can be cherry-picked to Cosmic. + + == Test == + Test kernel with these 3 patches could be found in: + http://people.canonical.com/~phlin/kernel/lp-1811566-chromebook-Gnawty/ + + Bug reporter stated that this kernel can fix the audio issue as + expected. + + == Regression potential == + Low, + changes are limited in the cht_bsw_max98090_ti driver with a new DMI based quirk table that contains these 3 Chromebook models and some logic to determine the right clock to use. + + It seems that commit 648e921888ad96ea3dc922739e96716ad3225d7f was backported to ubuntu's 4.18 kernel. That commit breaks audio for some devices (chromebook gnawty) (from 4.19 on). Now 4.19, 4.20, 5.0 are fixed, with patch on commit: 47148001ae12292984ba1b38d9babefb9a46cd3e ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook Gnawty Bug reported: https://bugzilla.kernel.org/show_bug.cgi?id=201787
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1811566 Title: Backported commit breaks audio (fixed upstream) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811566/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
