https://bugzilla.kernel.org/show_bug.cgi?id=217225
Bug ID: 217225
Summary: can no longer alter /proc/acpi/ibm/fan
Product: ACPI
Version: 2.5
Kernel Version: 6.1.20
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Fan
Assignee: [email protected]
Reporter: [email protected]
Regression: No
I occasionally manage my fan speed manually by changing the `level' in
`/proc/acpi/ibm/fan'. As of upgrading to 6.1.20, I am now getting the following
error when attempting to change the fan speed:
$ echo 'level auto' > /proc/acpi/ibm/fan
echo: write error: invalid argument
While troubleshooting, I tried double checking that fan_control had been set to
1 as noted in the documentation.
I recently upgraded my kernel a few versions at once, so unfortunately i can't
be sure when this bug originated. It was working with 6.1.15, and since
upgrading to 6.1.20 it is no longer working.
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