Spamming of 'line 105: echo: write error: Device or resource busy' in journal

[fxzzi]

Fill out information requested in this template, without doing so issue will be ignored & closed!

Have you tried?

• Searching through existing/closed issues to see if your bug has already been already submitted? Yes
• If installation failed with auto-cpufreq-installer,have you tried installing auto-cpufreq using Snap package? No
• Have you tried configuring auto-cpufreq? Yes
• Have you tried suggestions in troubleshooting section? Yes

Error output:

line 105: echo: write error: Device or resource busy

---

System information:

Add/paste output of:

-------------------------------------------------------------------------------

Linux distro: Arch Linux  
Linux kernel: 6.5.5-arch1-1
Processor: AMD Ryzen 5 PRO 7530U with Radeon Graphics
Cores: 12
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 4546 MHz
CPU min frequency: 400 MHz

Core	Usage	Temperature	Frequency
CPU0      0.0%        59 °C       400 MHz
CPU1      2.9%        59 °C      2665 MHz
CPU2      4.0%        59 °C      2298 MHz
CPU3      0.0%        59 °C       400 MHz
CPU4      2.0%        59 °C       400 MHz
CPU5      0.0%        59 °C      2507 MHz
CPU6      1.0%        59 °C      2327 MHz
CPU7      0.0%        59 °C      1916 MHz
CPU8      0.0%        59 °C       400 MHz
CPU9      1.0%        59 °C      2762 MHz
CPU10      1.0%        59 °C      3576 MHz
CPU11      1.0%        59 °C      2096 MHz

CPU fan speed: 0 RPM

auto-cpufreq version: 1.9.9 (git: fdb20f5e)

Python: 3.11.5
psutil package: 5.9.5
platform package: 1.0.8
click package: 8.1.7
distro package: 1.8.0

Computer type: Notebook
Battery is: charging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.24 %

Total CPU usage: 0.7 %
Total system load: 0.72
Average temp. of all cores: 59.00 °C 

Currently using: performance governor
Warning: CPU turbo is not available
Currently turbo boost is: off

-------------------------------------------------------------------------------

Also please be descriptive about the issue you're reporting, i.e: what you tried & what's the expected behaviour.

---

I have tried both the normal and -git packages on the AUR. I have also tried using the installer however both lead to the same issue. In output journalctl -xb there are a ton of errors with this same comment.

[Terrahop]

I'm getting the same thing on my end as well.

➜ sudo systemctl status auto-cpufreq.service
● auto-cpufreq.service - auto-cpufreq - Automatic CPU speed & power optimizer for Linux
     Loaded: loaded (/etc/systemd/system/auto-cpufreq.service; enabled; preset: disabled)
     Active: active (running) since Fri 2023-09-29 12:10:21 XXXX; 6min ago
   Main PID: 47353 (python)
      Tasks: 1 (limit: 18444)
     Memory: 24.9M
        CPU: 7.611s
     CGroup: /system.slice/auto-cpufreq.service
             └─47353 /opt/auto-cpufreq/venv/bin/python /opt/auto-cpufreq/venv/bin/auto-cpufreq --daemon

Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
Sep 29 12:17:14 XXX python[217983]: /usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy

Interestingly the reason I discovered this is I was trying to debug why this tool wasn't able to set the cpu turboboost option anymore even though it seemed to have worked fine in the past? I noticed @fxzzi has the same line in their output as I do
Warning: CPU turbo is not available

I've never seen this error show up until a recently, and it worked in the past, might have been an update?

Both mine and @fxzzi amd cpu's do support turboboost/core, could it be related to this at all?

my output from auto-cpufreq --debug:

-------------------------------------------------------------------------------

Linux distro: Arch Linux rolling n/a
Linux kernel: 6.5.5-arch1-1
Processor: AMD Ryzen 9 5900HS with Radeon Graphics
Cores: 16
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 4650 MHz
CPU min frequency: 1650 MHz

Core	Usage	Temperature	Frequency
CPU0     11.7%        70 °C      3995 MHz
CPU1      0.0%        70 °C       400 MHz
CPU2      8.9%        70 °C      4245 MHz
CPU3      1.0%        70 °C       400 MHz
CPU4     13.3%        70 °C      3573 MHz
CPU5      7.1%        70 °C      3877 MHz
CPU6     19.4%        70 °C      4030 MHz
CPU7      3.0%        70 °C       400 MHz
CPU8     12.9%        70 °C      3555 MHz
CPU9      7.0%        70 °C       400 MHz
CPU10      0.0%        70 °C      3572 MHz
CPU11     11.9%        70 °C      3993 MHz
CPU12      5.0%        70 °C      3929 MHz
CPU13      5.1%        70 °C      3928 MHz
CPU14     10.4%        70 °C      4468 MHz
CPU15      7.1%        70 °C      4415 MHz

CPU fan speed: 2200 RPM

auto-cpufreq version: 1.9.9 (git: fdb20f5e)

Python: 3.11.5
psutil package: 5.9.5
platform package: 1.0.8
click package: 8.1.7
distro package: 1.8.0

Computer type: Notebook
Battery is: charging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.22 %

Total CPU usage: 7.6 %
Total system load: 0.90
Average temp. of all cores: 70.00 °C

Currently using: performance governor
Warning: CPU turbo is not available
Currently turbo boost is: off

-------------------------------------------------------------------------------

[shadeyg56]

I have an AMD cpu as well. I will look into this

[Vyacheslav-S]

I have a similar problem:

/usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy
/usr/local/bin/cpufreqctl.auto-cpufreq: line 105: echo: write error: Device or resource busy

sudo auto-cpufreq --debug:

Linux distro: Arch Linux rolling n/a
Linux kernel: 6.5.5-zen1-1-zen
Processor: AMD Ryzen 5 5600H with Radeon Graphics
Cores: 12
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 4280 MHz
CPU min frequency: 400 MHz

Core	Usage	Temperature	Frequency
CPU0      2.0%        41 °C      4242 MHz
CPU1      0.0%        41 °C       400 MHz
CPU2      1.0%        41 °C       400 MHz
CPU3      0.0%        41 °C       400 MHz
CPU4      2.0%        41 °C       400 MHz
CPU5      1.0%        41 °C      3929 MHz
CPU6      1.0%        41 °C       400 MHz
CPU7      1.0%        41 °C      3358 MHz
CPU8      0.0%        41 °C      3473 MHz
CPU9      2.0%        41 °C       400 MHz
CPU10      1.0%        41 °C      3389 MHz
CPU11      0.0%        41 °C      3284 MHz

auto-cpufreq version: 

Python: 3.11.5
psutil package: 5.9.5
platform package: 1.0.8
click package: 8.1.7
distro package: 1.8.0

Computer type: Notebook
Battery is: charging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.21 %

Total CPU usage: 1.4 %
Total system load: 0.46
Average temp. of all cores: 41.00 °C 

Currently using: performance governor
Warning: CPU turbo is not available
Currently turbo boost is: off
`

[shadeyg56]

I've noticed all of us are using the amd-pstate-epp driver. Seems like it is linked to that.

[shadeyg56]

so I would recommend you guys switch over to using acpi-cpufreq driver as that is most compatible with auto-cpufreq. Information on this can be found in the Troubleshooting section of the README.
both amd-pstate and amd-pstate-epp provide their own sort of scaling and also disables turbo for some reason? not really sure why.

If you still feel that amd-pstate works better then continue to use that, but just know that is why journal is being spammed and seems to be the reason turbo is "disabled". you can still use auto-cpufreq for switching governors.

[shadeyg56]

A more in depth look on the amd-pstate driver can be found here on the kernel website for those interested

[hingen]

I am aware that the recommendation is to switch to the "acpi-cpufreq" driver. However, the "amd-pstate-epp" driver seems to make my desktop slightly more responsive when running on battery with little impact on the battery life.

Wondering if it would be possible to ignore the "line 105: echo: write error: Device or resource busy" error message? I can make a PR which does that, however, I'm unsure if it would have any adverse consequences.

[AdnanHodzic]

Wondering if it would be possible to ignore the "line 105: echo: write error: Device or resource busy" error message? I can make a PR which does that, however, I'm unsure if it would have any adverse consequences.

Always feel free to create a PR (especially for something that could be an improvement), and then things can be further tested during its review process.

Hence, give it a try and if PR is merged and you will be credited for your work as part of future release.

Update: sorry I just see now you already did this as part of #627