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 33A303C196F for ; Thu, 14 May 2026 07:30:27 +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=1778743828; cv=none; b=HH96sFOY+wl2IsS3nfMB5zDp3c4s+aXZxF1cXNQK1jbHEyUMBIWwdqpHt0Ifk4WUC80H5ejG9NMlTLL2DanXBnb+tnXWPI6MRvbPCVH8PdgeYC1p8wxfjOjIZuFf9QuT0jvqCGcP9c3Luy0oA/xit1pnTxBkaJpICH3eGIhdDws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778743828; c=relaxed/simple; bh=y+8H6g1YZibvHMhChxFmJVrrZEQrDRIDRibsNpFbUrA=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=sKXCX0NZQsvYeaFHXCP5YD/8QZPtuTlNAM21FVM/uhsAH9VnTQ/uvonPD8IjQb/UD6+E68xMvxsx8qN0O+YpuaNRtmwWy4iORum/BSYch6gCosgf31Gtt+f7cWVMctNDqd1GpX80AASPYQC4FQwreKWGoU22RHRJOUiIia6O0fM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=buD8UGrL; 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="buD8UGrL" Received: by smtp.kernel.org (Postfix) with ESMTPS id 4DA4BC2BCB7 for ; Thu, 14 May 2026 07:30:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778743827; bh=y+8H6g1YZibvHMhChxFmJVrrZEQrDRIDRibsNpFbUrA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=buD8UGrL1JJHc//9p9TfvUQumOxLqu5xH8Q9JYukaGGL87N/DhLklvwD/abrs+7+/ b8DgXoldAi33CHju8NT9FvVZaNXo98uV8BCrGY3nhCT37vBRAENt99LX5NMani/0Qy 7XIe0+PRQ13txK+VvQEYxazB0jhVwGmiumZW9c0rO4+K5NK0JFlhQz/Xe4128tM9D3 dB8yEX9ABVccXzTMoQBSOVoAFkUUye1e30paJlBsdmbLBPO7LcirPSKYRmtQ68g0Ii mK++woppU/iqo62ApFKAys2agVFdShPi5UFjpR1A9Xv9DXX02cddxPXZrVuqIaMCzd ODeYAx6z1miOw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 45D14C41616; Thu, 14 May 2026 07:30:27 +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: Thu, 14 May 2026 07:30:27 +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: rhys.r.edwards@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: cc 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 Rhys Edwards (rhys.r.edwards@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rhys.r.edwards@gmail.com --- Comment #11 from Rhys Edwards (rhys.r.edwards@gmail.com) --- Not sure if i'm adding much additional info here not already known but i al= so noticed this issue recently and believe it is also linked to the frequency limiting problem in https://bugzilla.kernel.org/show_bug.cgi?id=3D221473 as= i have/had both issues I've had cachyos installed using rc kernel on a desktop computer and last w= eek or so noticed cpu temps/wattage/frequency was much lower than normal, frequ= ency was specifically capping out at exactly 3Ghz regardless of workload. I don't recall changing any pstate profiles at any point since i installed a few months ago so i assume it was on performance(?) CPU: AMD Ryzen 7 5800x Mobo: MSI x570 Tomahawk Ram: 32GB DDR4 3600Mhz GPU: AMD RX570 4GB It seems mostly fixed when i switched back to balanced using powerprofilesc= tl, but now i also can't set back to performance getting the error mentioned he= re: Failed to communicate with power-profiles-daemon: g-io-error-quark: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._g_2dio_2derror_2dquark.Code= 26: Failed to activate CPU driver 'amd_pstate': Error writing '/sys/devices/system/cpu/cpufreq/policy11/energy_performance_preference': Device or resource busy (26) Here is my p-state triage if it's any use... =F0=9F=90=A7 CachyOS =F0=9F=90=A7 Kernel: 7.1.0-rc3-1-cachyos-rc =E2=97=8B 'status': active =E2=97=8B 'prefcore': enabled =F0=9F=90=A7 ITMT: Y =F0=9F=92=BB CPU: AMD Ryzen 7 5800X 8-Core Processor =F0=9F=94=8B Per-CPU sysfs files +---------+----------------+----------------------+----------------+-------= -------------+--------------------+---------------------------------+------= ------+---------+ | CPU # | CPU Min Freq | CPU Nonlinear Freq | CPU Max Freq | Scal= ing Min Freq | Scaling Max Freq | Energy Performance Preference | Prefcor= e |=20 Boost | |---------+----------------+----------------------+----------------+-------= -------------+--------------------+---------------------------------+------= ------+---------| | 0 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 176= |=20=20 1 | | 1 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 196= |=20=20 1 | | 2 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 186= |=20=20 1 | | 3 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 181= |=20=20 1 | | 4 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 171= |=20=20 1 | | 5 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 191= |=20=20 1 | | 6 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 166= |=20=20 1 | | 7 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 196= |=20=20 1 | | 8 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 176= |=20=20 1 | | 9 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 196= |=20=20 1 | | 10 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 186= |=20=20 1 | | 11 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 181= |=20=20 1 | | 12 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 171= |=20=20 1 | | 13 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 191= |=20=20 1 | | 14 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 166= |=20=20 1 | | 15 | 555531 | 1754308 | 4853585 |=20=20= =20=20=20=20=20=20=20=20=20 1754308 | 4853585 | balance_performance | 196= |=20=20 1 | +---------+----------------+----------------------+----------------+-------= -------------+--------------------+---------------------------------+------= ------+---------+ =F0=9F=94=8B CPPC MSRs +---------+----------+----------+---------+---------+-----------+ | CPU # | Enable | Status | Cap 1 | Cap 2 | Request | |---------+----------+----------+---------+---------+-----------| | 0 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 1 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 2 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 3 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 4 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 5 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 6 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 7 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 8 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 9 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 10 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 11 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 12 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 13 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 14 | 0 | 0 | 0x0 | 0x0 | 0x0 | | 15 | 0 | 0 | 0x0 | 0x0 | 0x0 | +---------+----------+----------+---------+---------+-----------+ =F0=9F=94=8B MSR_AMD_CPPC_CAP1 (decoded) +---------+---------------+------------------+----------------+------------= ----+ | CPU # | Lowest Perf | Nonlinear Perf | Nominal Perf | Highest P= erf | |---------+---------------+------------------+----------------+------------= ----| | 0 | 0 | 0 | 0 | = 0 | | 1 | 0 | 0 | 0 | = 0 | | 2 | 0 | 0 | 0 | = 0 | | 3 | 0 | 0 | 0 | = 0 | | 4 | 0 | 0 | 0 | = 0 | | 5 | 0 | 0 | 0 | = 0 | | 6 | 0 | 0 | 0 | = 0 | | 7 | 0 | 0 | 0 | = 0 | | 8 | 0 | 0 | 0 | = 0 | | 9 | 0 | 0 | 0 | = 0 | | 10 | 0 | 0 | 0 | = 0 | | 11 | 0 | 0 | 0 | = 0 | | 12 | 0 | 0 | 0 | = 0 | | 13 | 0 | 0 | 0 | = 0 | | 14 | 0 | 0 | 0 | = 0 | | 15 | 0 | 0 | 0 | = 0 | +---------+---------------+------------------+----------------+------------= ----+ =F0=9F=94=8B MSR_AMD_CPPC_REQ (decoded) +---------+------------+------------+----------------+---------------------= ------+ | CPU # | Min Perf | Max Perf | Desired Perf | Energy Performance Perf | |---------+------------+------------+----------------+---------------------= ------| | 0 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 1 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 2 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 3 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 4 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 5 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 6 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 7 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 8 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 9 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 10 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 11 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 12 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 13 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 14 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | | 15 | 0 | 0 | 0 |=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0 | +---------+------------+------------+----------------+---------------------= ------+ --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=