On 11/01/2017 11:09 AM, Hans de Goede wrote:
I'm working on trying to improve the OOTB power-consumption
of Fedora Workstation on laptops.
One of the easy wins here is setting snd_hda_intel.power_save=1,
which saves about 0.4W which given that modern laptops idle at
around 6-8W is a significant saving.
I've asked the upstream kernel devs if there are any downsides
to setting SND_HDA_POWER_SAVE_DEFAULT=1 and I got a reply that
this should be fine and that OpenSUSE Tumbleweed is already
So unless there are any objections I would like to change this
option to 1 starting with 4.14 kernel. Is that ok ?
I'm always a bit uneasy about enabling hardware power saving
since it rarely seems to be done correctly but as Peter pointed
out it's easy to revert if something goes wrong. Having the
endorsement of upstream is also good since it means they should
Enabling for 4.14 sounds like a good plan. Did you intend for
this to end up in stable releases on rebase?