After upgrade to kernel 4.14.3, the sound no longer works on my oldest PC. Instead, speakers and headset issue click noises every second (just one click during startup is normal for this hardware). journalctl doesn't show up any suspicious messages and processes alsactl, pulseaudio and pnmixer run as usual. The same applies to kernel 4.14.4 with Fedora 26 which is installed on a different partition. Up to kernel 4.13.16 sound worked fine. The audio device is described by lshw as "82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller".
I suspect this is from CONFIG_SND_HDA_POWER_SAVE_DEFAULT being turned from 0 to 1. Can you check to make sure the problem is still present in v4.14.5, then install [0] and see if it goes away? That build turns the setting back to 0. [0] https://koji.fedoraproject.org/koji/taskinfo?taskID=23668532
Right, note that an easier way to test this is to pass snd_hda_intel.power_save=0 on the kernel commandline.
Ah, yes, that's definitely easier :)
You are right. I added snd_hda_intel.power_save=0 to the kernel command line in /etc/default/grub, ran grub2-mkconfig and that fixes the issue. Many thanks to both of you for the quick clarification!
Hmm, ok. So I think the best way to fix this is to only set CONFIG_SND_HDA_POWER_SAVE_DEFAULT to 1 on x86_64 builds and not bother with it on old machines which only run 32 bit code. Basically change: configs/base-generic/CONFIG_SND_HDA_POWER_SAVE_DEFAULT back to: CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0 And create a new: configs/base-generic/x86/x86_64/CONFIG_SND_HDA_POWER_SAVE_DEFAULT with: CONFIG_SND_HDA_POWER_SAVE_DEFAULT=1 in there. Jeremy, do you agree and can you take care of this? Regards, Hans
That sounds reasonable to me. I'll take care of it, it should end up in the v4.14.6 stable builds. Thanks for your help, Hans!
Is this related https://bugzilla.redhat.com/show_bug.cgi?id=1525104
kernel-4.14.6-300.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2017-129969aa8a
kernel-4.14.6-300.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-129969aa8a
kernel-4.14.6-200.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-ba6b6e71f7
kernel-4.14.6-200.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-ba6b6e71f7
kernel-4.14.6-300.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.
kernel-4.14.6-200.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.