linux-kernel - Re: [PATCH v3 0/1] asus-wmi: add platform

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Date:   Sun, 15 Aug 2021 15:48:49 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Luke Jones <luke@...nes.dev>, linux-kernel@...r.kernel.org
Cc:     hadess@...ess.net, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v3 0/1] asus-wmi: add platform_profile support

Hi,

On 8/14/21 9:51 AM, Luke Jones wrote:
> 
> 
> On Sat, Aug 14 2021 at 16:31:02 +1200, Luke D. Jones <luke@...nes.dev> wrote:
>> Changelog:
>> - V2
>>   + Correctly unregister from platform_profile if
>>     throttle_thermal_policy fails
>>   + Do platform_profile_notify() in both throttle_thermal_policy_store()
>>     and in throttle_thermal_policy_switch_next()
>>   + Remove unnecessary prep for possible fan-boost modes as this
>>     doesn't match expected platform_profile behaviour
>> - V3
>>   + Add missing declaration for err in
>>     throttle_thermal_policy_switch_next
>>
>> Luke D. Jones (1):
>>   asus-wmi: Add support for platform_profile
>>
>>  drivers/platform/x86/asus-wmi.c | 139 +++++++++++++++++++++++++++++++-
>>  1 file changed, 135 insertions(+), 4 deletions(-)
>>
>> -- 
>> 2.31.1
> 
> Hi,
> 
> I teested the patch again and it appears that the platform_profile_notify() in both throttle_thermal_policy_store() and throttle_thermal_policy_switch_next() updates the /sys/firmware/acpi/platform_profile sysfs path fine, but userspace isn't updated?
> 
> The way I'm checking is:
> 1. echo 1 |sudo tee /sys/devices/platform/asus-nb-wmi/throttle_thermal_policy
> 2. cat -p /sys/firmware/acpi/platform_profile
>   - performance (updated correctly by platform_profile_notify)
> 3. Check gnome-settings, not updated.
> 
> Doing `echo "performance" |sudo tee /sys/firmware/acpi/platform_profile` updates both throttle_thermal_policy and userspace as expected. I'm wondering if I've missed something?

If you add a printk where you call platform_profile_notify() and you see that
happening, then you are likely seeing a userspace bug. Possibly your
power-profile-daemon is simply a bit old and therefor does not support
the combination of profiles which asus-wmi offers, IIRC it falls back to
using intel-pstate in that case.

You could try building the latest power-profile-daemon from git and run
it in verbose mode. If it sees the changes and the control-panel applet is
still not updating then I would not worry about that. The userspace code
is still somewhat new and I'm not sure which version your distro is
running and how well it is keeping up with gnome-updates.

Regards,

Hans