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 [thread overview]
Message-ID: <bug-221505-137361-FpgUN2mveA@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-221505-137361@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=221505
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 also
noticed this issue recently and believe it is also linked to the frequency
limiting problem in https://bugzilla.kernel.org/show_bug.cgi?id=221473 as i
have/had both issues
I've had cachyos installed using rc kernel on a desktop computer and last week
or so noticed cpu temps/wattage/frequency was much lower than normal, frequency
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 powerprofilesctl,
but now i also can't set back to performance getting the error mentioned here:
Failed to communicate with power-profiles-daemon: g-io-error-quark:
GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._g_2dio_2derror_2dquark.Code26:
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...
🐧 CachyOS
🐧 Kernel: 7.1.0-rc3-1-cachyos-rc
○ 'status': active
○ 'prefcore': enabled
🐧 ITMT: Y
💻 CPU: AMD Ryzen 7 5800X 8-Core Processor
🔋 Per-CPU sysfs files
+---------+----------------+----------------------+----------------+--------------------+--------------------+---------------------------------+------------+---------+
| CPU # | CPU Min Freq | CPU Nonlinear Freq | CPU Max Freq | Scaling
Min Freq | Scaling Max Freq | Energy Performance Preference | Prefcore |
Boost |
|---------+----------------+----------------------+----------------+--------------------+--------------------+---------------------------------+------------+---------|
| 0 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 176 |
1 |
| 1 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 196 |
1 |
| 2 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 186 |
1 |
| 3 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 181 |
1 |
| 4 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 171 |
1 |
| 5 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 191 |
1 |
| 6 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 166 |
1 |
| 7 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 196 |
1 |
| 8 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 176 |
1 |
| 9 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 196 |
1 |
| 10 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 186 |
1 |
| 11 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 181 |
1 |
| 12 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 171 |
1 |
| 13 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 191 |
1 |
| 14 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 166 |
1 |
| 15 | 555531 | 1754308 | 4853585 |
1754308 | 4853585 | balance_performance | 196 |
1 |
+---------+----------------+----------------------+----------------+--------------------+--------------------+---------------------------------+------------+---------+
🔋 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 |
+---------+----------+----------+---------+---------+-----------+
🔋 MSR_AMD_CPPC_CAP1 (decoded)
+---------+---------------+------------------+----------------+----------------+
| CPU # | Lowest Perf | Nonlinear Perf | Nominal Perf | Highest Perf
|
|---------+---------------+------------------+----------------+----------------|
| 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
|
+---------+---------------+------------------+----------------+----------------+
🔋 MSR_AMD_CPPC_REQ (decoded)
+---------+------------+------------+----------------+---------------------------+
| CPU # | Min Perf | Max Perf | Desired Perf | Energy Performance
Perf |
|---------+------------+------------+----------------+---------------------------|
| 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 |
+---------+------------+------------+----------------+---------------------------+
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prev parent reply other threads:[~2026-05-14 7:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-11 17:45 [Bug 221505] New: REGRESSION][amd_pstate] "EPP cannot be set under performance policy" (EBUSY) when switching to performance profile via PPD on 7.1 bugzilla-daemon
2026-05-11 20:15 ` [Bug 221505] " bugzilla-daemon
2026-05-13 6:17 ` bugzilla-daemon
2026-05-13 11:03 ` bugzilla-daemon
2026-05-13 15:39 ` bugzilla-daemon
2026-05-13 15:43 ` bugzilla-daemon
2026-05-13 16:57 ` bugzilla-daemon
2026-05-13 17:12 ` bugzilla-daemon
2026-05-13 18:41 ` bugzilla-daemon
2026-05-13 18:44 ` bugzilla-daemon
2026-05-13 19:14 ` bugzilla-daemon
2026-05-14 7:30 ` bugzilla-daemon [this message]
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