** Tags added: originate-from-1906747 -- 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/1919930
Title: power off stress test will hang on the TGL machines Status in HWE Next: New Status in linux package in Ubuntu: In Progress Status in linux-oem-5.10 package in Ubuntu: In Progress Status in linux-oem-5.10 source package in Focal: In Progress Status in linux source package in Groovy: In Progress Status in linux source package in Hirsute: In Progress Bug description: Intel suggested that we do 2 actions to fix this problem, the 1st is merging 5 kernel patches, this only applies to H and OEM-5.10 since there is no tgl.c in the groovy kernel yet. the 2nd is change a kernel config, this change applies to H, G and OEM-5.10. https://github.com/thesofproject/linux/issues/2781 [Impact] When we run poweroff/on stress test on some lenovo TGL laptop, the system will randomly hang, and when this issue happens, the dmesg shows the sof audio driver fails. [Fix] Intel recommend that we backport 5 kernel patches and change a kernel config. [Test] After applying the changes, and test on TGL/cml/whl machines, the audio function works as good as before, and the poweroff stress test didn't hang anymore. [Where problems could occur] The kernel patches probably could introduce issues when system powre off or reboot on TGL machines, but this possibility is low since we have tested these patches on different TGL machines. the kernel option change could introduce power consumption regression, but it only affects power saving and package_cstate values when any capture stream is active, while no impact if all capture streams are inactive. that is to say, in theory it will not impact the power consumption in short idle or long idle. And I checked the system cound enter package_c10 after this change. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1919930/+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
