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 |
+---------+------------+------------+----------------+---------------------------+
--
You may reply to this email to add a comment.
You are receiving this mail because:
You are the assignee for the bug.
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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-221505-137361-FpgUN2mveA@https.bugzilla.kernel.org/ \
--to=bugzilla-daemon@kernel.org \
--cc=linux-pm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.