APPLIED[D]: [SRU][B/OEM-B/C/D][PATCH 0/3] repeating crackling noise happens after 19.04 upgrade
kleber.souza at canonical.com
Tue Apr 23 15:28:32 UTC 2019
On 4/18/19 5:55 AM, Hui Wang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1821663
> This is because the kernel config CONFIG_SND_HDA_POWER_SAVE_DEFAULT is changed to
> 1 in the recent disco kernel.
> I also backported the patch to cosmic and bionic since this patch is harmless to
> cosmic and bionic.
> For Disco kernel, we only need 1 patch. Because of patch conflicting, cosmic
> kernel needs 2 patches and bionic kernel needs 3 patches.
> After CONFIG_SND_HDA_POWER_SAVE_DEFAULT is changed to 1, the codec runtime PM is
> enabled, on some codecs or for some hw design, there is noise with the codec
> runtime PM enabled.
> put the machine in the power_save_black_list, this will set the power_save=0
> [Test Case]
> just boot up and do some audio operations, there is no noise anymore
> [Regression Risk]
> Low. this patch ony applies to the specific machines.
> Hans de Goede (1):
> ALSA: hda: Add Intel NUC7i3BNB to the power_save blacklist
> Hui Wang (1):
> ALSA: hda - Add two more machines to the power_save_blacklist
> Jaroslav Kysela (1):
> ALSA: hda - add Lenovo IdeaCentre B550 to the power_save_blacklist
> sound/pci/hda/hda_intel.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
Applied to disco/master-next branch.
More information about the kernel-team