* [Bug 219858] New: AMD Zen 2 broken power management after sleep
@ 2025-03-12 1:32 bugzilla-daemon
2025-03-12 18:58 ` [Bug 219858] " bugzilla-daemon
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From: bugzilla-daemon @ 2025-03-12 1:32 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
Bug ID: 219858
Summary: AMD Zen 2 broken power management after sleep
Product: Power Management
Version: 2.5
Hardware: AMD
OS: Linux
Status: NEW
Severity: high
Priority: P3
Component: cpufreq
Assignee: linux-pm@vger.kernel.org
Reporter: diogotavc@protonmail.com
Regression: No
I have a ThinkPad E14 Gen 3 (Ryzen 7 5700U, Zen 2) running Fedora 41 with the
6.13.5-200.fc41.x86_64 kernel. After sleep (s2idle), the device will no longer
respect hints or sysfs nodes (not sure these are the right terms). At first I
thought this could be related to a recent BIOS/firmware upgrade, but it wasn't
a new occurance (tho, I hadn't taken any time to understand and diagnose the
issue).
As an example, sometimes I'll set the profile to Power Saver (regardless if
it's tuned-ppd or power-profiles-daemon), or manually set the value of
`/sys/devices/system/cpu/cpu*/cpufreq/energy_performance_preference` to `power`
and `/sys/devices/system/cpu/cpu*/cpufreq/boost` to `0`, and it'll boost
seemingly arbitrarily even if CPU load is low. To keep track of a few stats,
quickly wrote the following script:
```bash
#!/bin/bash
# Battery
batteryPath="/sys/class/power_supply/BAT0"
batteryStatus=$(cat "$batteryPath/status")
# Fan
currentLevel=$(cat /proc/acpi/ibm/fan | grep "level:" | awk '{print $2}')
fanSpeed=$(sensors | grep 'fan1:' | tail -c 10 | tr -d ' ' | sed 's/RPM//')
# CPU
cpuTemp=$(sensors | grep 'CPU:' | tail -c 10 | tr -d ' ' | sed 's/°C//')
cpuFreq=$(awk -F ': ' '/cpu MHz/ {print int($2)}' /proc/cpuinfo | sort -nr |
head -n 1)
# Power consumption
consumption=$(expr $(cat "$batteryPath/power_now") / 100000)
units=$(expr $consumption / 10)
decimal=$(expr $consumption % 10)
consumption=$units.$decimal
echo "Battery: $consumption W ($batteryStatus)"
echo "Fan Speed: $fanSpeed RPM ($currentLevel)"
echo "Temperature: $cpuTemp°C ($cpuFreq MHz)"
```
With this script, I can verify that the max frequency (between all threads)
before suspending is typically around 1.4GHz for the task at hand and, after
suspending, is glued to 4.3GHz almost permanently for the same task (near
idle). I've also taken the time, in multiple different scenarios, to see how
many threads were hitting those clock speeds, and it always seemed to be 2 to
4, with every other thread between 2 and 3GHz (although usually the latter,
keeping in mind the base clock is 1.8GHz). This, as you'd imagine, causes a ton
of unnecessary heat and energy consumption (might not manifest itself as much
for lighter tasks, but can be problematic if the load is higher).
One side note is that sometimes I'd wake the laptop up and have only the first
core with boost set to `0` and the rest with boost set to `1`
(`/sys/devices/system/cpu/cpu*/cpufreq/boost`). Not sure it's relevant, but it
was something I noticed.
It happens on all scaling drivers (`amd_pstate=active`, `amd_pstate=passive`,
`amd_pstate=guided`, and `amd_pstate=disable`) and seems to happen exclusively
on kernels 6.13 and up (6.11 doesn't display this behaviour at all, and my
testing with 6.12 isn't yet very conclusive), so it's reproducible. It's not
exclusive to Fedora, but may be specific to my laptop model and/or my CPU.
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
@ 2025-03-12 18:58 ` bugzilla-daemon
2025-03-12 19:31 ` bugzilla-daemon
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bugzilla-daemon @ 2025-03-12 18:58 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #1 from Diogo Carvalho (diogotavc@protonmail.com) ---
I can also confirm this is still broken on kernel
6.14.0-0.rc6.20250312gt0fed89a9.350.vanilla.fc41.x86_64 (from
https://fedoraproject.org/wiki/Kernel_Vanilla_Repositories). Here's a video
showcasing the behaviour in question:
https://youtu.be/jtBjuvwax_s
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
2025-03-12 18:58 ` [Bug 219858] " bugzilla-daemon
@ 2025-03-12 19:31 ` bugzilla-daemon
2025-03-21 15:41 ` bugzilla-daemon
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bugzilla-daemon @ 2025-03-12 19:31 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #2 from Diogo Carvalho (diogotavc@protonmail.com) ---
Couldn't find any kernel newer than 6.12.15 that I can easily run on my Fedora
installation, so I've switched to 6.12.15-200.fc41.x86_64
(https://koji.fedoraproject.org/koji/buildinfo?buildID=2661636) and added a
versionlock for now. Can confirm the behaviour hasn't presented itself, meaning
it's solely affecting 6.13 and newer.
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
2025-03-12 18:58 ` [Bug 219858] " bugzilla-daemon
2025-03-12 19:31 ` bugzilla-daemon
@ 2025-03-21 15:41 ` bugzilla-daemon
2025-03-21 15:44 ` bugzilla-daemon
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bugzilla-daemon @ 2025-03-21 15:41 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
Diogo Carvalho (diogotavc@protonmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mario.limonciello@amd.com
Regression|No |Yes
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
` (2 preceding siblings ...)
2025-03-21 15:41 ` bugzilla-daemon
@ 2025-03-21 15:44 ` bugzilla-daemon
2025-03-21 15:49 ` bugzilla-daemon
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From: bugzilla-daemon @ 2025-03-21 15:44 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #3 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
On 6.14-rc can you please run this script before suspend and after suspend and
share the text reports it generates?
https://web.git.kernel.org/pub/scm/linux/kernel/git/superm1/amd-debug-tools.git/tree/amd_pstate.py
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
` (3 preceding siblings ...)
2025-03-21 15:44 ` bugzilla-daemon
@ 2025-03-21 15:49 ` bugzilla-daemon
2025-03-21 16:13 ` bugzilla-daemon
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From: bugzilla-daemon @ 2025-03-21 15:49 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #4 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
Also; if possible can you please see if you can reproduce it on this branch?
https://web.git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/log/?h=linux-next
This is the code that is going into 6.15-rc1. If it's fixed there, I might be
able to identify a commit to backport to 6.14.y.
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
` (4 preceding siblings ...)
2025-03-21 15:49 ` bugzilla-daemon
@ 2025-03-21 16:13 ` bugzilla-daemon
2025-03-21 16:15 ` bugzilla-daemon
` (2 subsequent siblings)
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From: bugzilla-daemon @ 2025-03-21 16:13 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #5 from Diogo Carvalho (diogotavc@protonmail.com) ---
Before:
```
2025-03-21 16:08:24,596 INFO: 🐧 Kernel: 6.14.0-0.rc6.49.fc42.x86_64
2025-03-21 16:08:24,596 INFO: 'status': active
2025-03-21 16:08:24,597 INFO: 'prefcore': disabled
2025-03-21 16:08:24,637 INFO: 💻 CPU: AMD Ryzen 7 5700U with Radeon
Graphics
2025-03-21 16:08:24,643 INFO: 🔋 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 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 1 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 2 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 3 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 4 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 5 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 6 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 7 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 8 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 9 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 10 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 11 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 12 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 13 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 14 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 15 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
+---------+----------------+----------------------+----------------+--------------------+--------------------+---------------------------------+------------+---------+
2025-03-21 16:08:24,654 WARNING: 🚦 MSR checks unavailable
```
After:
```
2025-03-21 16:09:31,138 INFO: 🐧 Kernel: 6.14.0-0.rc6.49.fc42.x86_64
2025-03-21 16:09:31,138 INFO: 'status': active
2025-03-21 16:09:31,138 INFO: 'prefcore': disabled
2025-03-21 16:09:31,155 INFO: 💻 CPU: AMD Ryzen 7 5700U with Radeon
Graphics
2025-03-21 16:09:31,157 INFO: 🔋 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 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 1 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 2 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 3 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 4 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 5 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 6 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 7 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 8 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 9 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 10 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 11 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 12 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 13 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 14 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
| 15 | 400000 | 1114000 | 4373000 |
1114000 | 1801000 | power | 255 |
1 |
+---------+----------------+----------------------+----------------+--------------------+--------------------+---------------------------------+------------+---------+
2025-03-21 16:09:31,162 WARNING: 🚦 MSR checks unavailable
```
After (setting power saving mode again):
```
2025-03-21 16:08:51,541 INFO: 🐧 Kernel: 6.14.0-0.rc6.49.fc42.x86_64
2025-03-21 16:08:51,542 INFO: 'status': active
2025-03-21 16:08:51,542 INFO: 'prefcore': disabled
2025-03-21 16:08:51,557 INFO: 💻 CPU: AMD Ryzen 7 5700U with Radeon
Graphics
2025-03-21 16:08:51,559 INFO: 🔋 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 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 1 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 2 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 3 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 4 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 5 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 6 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 7 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 8 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 9 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 10 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 11 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 12 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 13 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 14 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
| 15 | 400000 | 1114000 | 1801000 |
1114000 | 1801000 | power | 255 |
0 |
+---------+----------------+----------------------+----------------+--------------------+--------------------+---------------------------------+------------+---------+
2025-03-21 16:08:51,563 WARNING: 🚦 MSR checks unavailable
```
I can confirm that it still boosts over the supposed max frequency, regardless.
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
` (5 preceding siblings ...)
2025-03-21 16:13 ` bugzilla-daemon
@ 2025-03-21 16:15 ` bugzilla-daemon
2025-03-21 16:15 ` bugzilla-daemon
2025-03-21 16:18 ` bugzilla-daemon
8 siblings, 0 replies; 10+ messages in thread
From: bugzilla-daemon @ 2025-03-21 16:15 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #6 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
Got it; this is a non-MSR system.
Try this patch
https://web.git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/commit/?h=linux-next&id=b7a41156588ad03757bf0a2f0e05d6cbcebeaa9e
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
` (6 preceding siblings ...)
2025-03-21 16:15 ` bugzilla-daemon
@ 2025-03-21 16:15 ` bugzilla-daemon
2025-03-21 16:18 ` bugzilla-daemon
8 siblings, 0 replies; 10+ messages in thread
From: bugzilla-daemon @ 2025-03-21 16:15 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
--- Comment #7 from Diogo Carvalho (diogotavc@protonmail.com) ---
not sure that was the best way to send the report, sorry!
Regarding the kernel, I'll try to compile and test it later today. If not,
probably only on Monday
The issue doesn't seem to be regarding any specific scaling driver, tho, as I
said. It's something else, as it affects every scaling driver (including the
generic acpi driver)
Thanks!
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* [Bug 219858] AMD Zen 2 broken power management after sleep
2025-03-12 1:32 [Bug 219858] New: AMD Zen 2 broken power management after sleep bugzilla-daemon
` (7 preceding siblings ...)
2025-03-21 16:15 ` bugzilla-daemon
@ 2025-03-21 16:18 ` bugzilla-daemon
8 siblings, 0 replies; 10+ messages in thread
From: bugzilla-daemon @ 2025-03-21 16:18 UTC (permalink / raw)
To: linux-pm
https://bugzilla.kernel.org/show_bug.cgi?id=219858
Mario Limonciello (AMD) (mario.limonciello@amd.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|linux-pm@vger.kernel.org |mario.limonciello@amd.com
--- Comment #8 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
> not sure that was the best way to send the report, sorry!
Yeah attachment would have been better. But no worry, hopefully it's the root
cause I suspect and thus a duplicate of
https://bugzilla.kernel.org/show_bug.cgi?id=217931
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