linux-kernel - Re: [PATCH] platform/x86: acer-wmi: improve platform profile handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CALiyAokg_-Mc2R_OL03AF32=EPcFS1+RYoA9G6r8iJj9ZEMtmA@mail.gmail.com>
Date: Sat, 4 Jan 2025 01:22:27 +0530
From: Hridesh MG <hridesh699@...il.com>
To: Kurt Borja <kuurtb@...il.com>
Cc: Armin Wolf <W_Armin@....de>, "Lee, Chun-Yi" <jlee@...e.com>, Hans de Goede <hdegoede@...hat.com>, 
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Shuah Khan <skhan@...uxfoundation.org>, onenowy@...il.com
Subject: Re: [PATCH] platform/x86: acer-wmi: improve platform profile handling

> Do you perhaps know if users expect a thermal profile change on AC
> connect/disconnect events on Windows? This would solve this discussion
> [1].
Yep, there is a profile change on AC disconnect on Windows.
Specifically, it forces the balanced platform profile and returns to
the last active profile on replugging (the UI disallows changing of
profiles when disconnected but it is possible via WMI)

> From my testing, what I've found out is that even if we don't handle
> on_AC, the profile is still set but the hardware will not put the
> changes into effect until we plug in AC.
I did some more testing and I was a bit mistaken in the way it works.
While the system is unplugged it will still apply the three different
profiles (as evident by the differing fan speeds) but the CPU will
aggressively throttle under stress, placing an upper limit on the
maximum clock rate, this limit is lifted upon plugging in AC.

--
Thanks,
Hridesh MG