Re: [PATCH v4 1/1] asus-wmi: Add support for custom fan curves
From: Bastien Nocera
Date: Mon Aug 23 2021 - 06:28:31 EST
On Sat, 2021-08-21 at 09:30 +1200, Luke Jones wrote:
>
>
> On Fri, Aug 20 2021 at 13:39:02 +0200, Bastien Nocera
> <hadess@xxxxxxxxxx> wrote:
> > On Fri, 2021-08-20 at 23:00 +1200, Luke Jones wrote:
> > >
> > >
> > > On Fri, Aug 20 2021 at 12:51:08 +0200, Bastien Nocera
> > > <hadess@xxxxxxxxxx> wrote:
> > > > On Fri, 2021-08-20 at 12:43 +0200, Bastien Nocera wrote:
> > > > > On Fri, 2021-08-20 at 22:33 +1200, Luke Jones wrote:
> > > > > > > Am I going to get bug reports from Asus users that will
> > > > > complain
> > > > > > > that
> > > > > > > power-profiles-daemon doesn't work correctly, where I
> > > will
> > > > > have
> > > > > > > to
> > > > > > > wearily ask if they're using an Asus Rog laptop?
> > > > > >
> > > > > > No. Definitely not. The changes to fan curves per-profile
> > > need
> > > > > to
> > > > > > be
> > > > > > explicitly enabled and set. So a new user will be unaware
> > > that
> > > > > this
> > > > > > control exists (until they look for it) and their laptop
> > > will
> > > > > > behave
> > > > > > exactly as default.
> > > > >
> > > > > "The user will need to change the fan curves manually so
> > > will
> > > > > definitely remember to mention it in bug reports" is a very
> > > > > different
> > > > > thing to "the user can't change the fan curves to be
> > > nonsensical
> > > > > and
> > > > > mean opposite things".
> > > > >
> > > > > I can assure you that I will eventually get bug reports
> > > from
> > > > > "power
> > > > > users" who break their setup and wonder why things don't
> > > work
> > > > > properly,
> > > > > without ever mentioning the changes they made changes to
> > > the
> > > fan
> > > > > curves, or anything else they might have changed.
> > > >
> > > > A way to taint the settings that power-profiles-daemon could
> > > catch
> > > > would be fine by me. I absolutely don't want to have to
> > > support
> > > > somebody's tweaks until they undo them.
> > >
> > > Definitely understood. Do you have something in mind?
> >
> > A sysfs attribute with boolean data that shows whether custom fan
> > curves are used would be enough.
>
> The path /sys/devices/platform/asus-nb-wmi/active_fan_curve_profiles
> should be usable like this? I added this as the method for
> controlling
> which fan curves for which profiles are active.
>
> If empty, then no custom fan curves are active at all. If it contains
> any combination of strings "quiet, balanced, performance" then those
> associated (named) platform_profiles have an active fan curve and you
> can throw up a general warning, maybe add the contents of that file
> too?
That works for me, although I would probably have preferred a way that
wasn't specific to the asus-wmi module, I'm sure I can made do with
that.
Thanks