From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A9CD3357CF7 for ; Wed, 13 May 2026 15:39:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778686778; cv=none; b=FdBprmrJPvcLykgEdUACSesEfw9wZWPIG2M412m5/2SoNVBbswC3yEg9Gt4asbN486/K0ui2xNmjC5hHl/oOCYusGEpi5reXPVOZIwXu4jMkH7rZ86kUDd6buemgNLXnF940XpYHmS0mfswPyvEf2cw1I2O0sE+a9FnEIZ05Ay8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778686778; c=relaxed/simple; bh=zaWX9knVjHiJMbXOY44LHhUaqAoNwahlhauv6FJwaG8=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=dWoxqC9lkaBZ7KnSFseWxa/JFCr3CD0Pc1K/mbLS28rPHAjvS74+Kf6N+2U25ZpB3hxutiX3xMSb/GU0Eds9ic7zJShh4xYvHeBZlA7nX/gZfvEB5XV0qM3EAEOiVL0Jy5HwAlA+6eX35N7QyS1gI/zPeolij1qfxsSJw+yO3Ds= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=P2wrJMNg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="P2wrJMNg" Received: by smtp.kernel.org (Postfix) with ESMTPS id 4E12DC2BCC6 for ; Wed, 13 May 2026 15:39:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778686778; bh=zaWX9knVjHiJMbXOY44LHhUaqAoNwahlhauv6FJwaG8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=P2wrJMNgX87wyzPlfMj7ucVBR0RKlpi+rWxfMx1MtRbhstEqiUGiLZmDHGxL5Qkiw wyoBb48DG2LZ9ukmOcmuQ/ehcccV/zkltdkFc+OSdzlJV8b0/6Il2RRABgiK0/KxcL a+Paz4Soc0TqTdQO7A1leuo3PsxV8OzeGyd2AtXgAtpHZ1I/vo6335F3/JV7DMTZiB 7fDBGCyleyTU0rKPZsGBjOcycT5voZ8oXagpI65OhVQI26H/m3fB4C3tpLH7a9b8eP fh4TT8N5wuq4nThjJtRce3aMOczZocEi3vlxyErYFZEZmrrWPHFJAS2BNNkiYPhpk4 9mFI2XLjo44og== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 3A1B1C41616; Wed, 13 May 2026 15:39:38 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 221505] REGRESSION][amd_pstate] "EPP cannot be set under performance policy" (EBUSY) when switching to performance profile via PPD on 7.1 Date: Wed, 13 May 2026 15:39:38 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Power Management X-Bugzilla-Component: cpufreq X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: sergeyluashkov@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-pm@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221505 --- Comment #4 from Sergey (sergeyluashkov@gmail.com) --- (In reply to Mario Limonciello (AMD) from comment #3) > Did you set CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP After enabling CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP=3Dy, power-profiles-daemon= (PPD) loses the ability to switch to the power-saver profile. Attempting to set it via powerprofilesctl set power-saver results in the system defaulting back = to balanced. Technical details: Governor limitation: cat /sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors ret= urns only [performance, powersave]. PPD Failure: Since only two governors are visible, PPD fails to map the "power-saver" profile correctly, even though the underlying hardware supports it. Manual Override: I discovered that the only way to successfully force the "power-saver" stat= e is by writing directly to the platform profile: echo "quiet" | sudo tee /sys/devices/platform/asus-nb-wmi/platform-profile/platform-profile-25/prof= ile (Note: The path may vary, but the "quiet" hint works where PPD fails). Steps to Reproduce: Enable CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP=3Dy. Try to set power-saver: powerprofilesctl set power-saver. Check status: powerprofilesctl get returns balanced. Expected Result: PPD should recognize that in active/dynamic_epp mode, "power-saver" should = map to the powersave governor with an EPP hint of power (or quiet at the platfo= rm level) Actual Result: PPD is stuck between two profiles (balanced/performance) --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=