** Description changed: - This bug is for tracking purpose. + 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.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1919930 Title: power off stress test will hang on the TGL machines To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1919930/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
