I am trying to set power control of ahci port to auto using the following rule : SUBSYSTEM=="ata_port", KERNEL=="ata*", ATTR{power/control}=="auto" But it is not working. sudo udevadm info -a /sys/class/ata_port/ata1 Udevadm info starts with the device specified by the devpath and then walks up …

The attribute you want to change is actually device/power/control not power/control so you want a rule like: SUBSYSTEM=="ata_port", KERNEL=="ata*", ATTR{device/power/control}="auto"

Even after correcting the error, it still does not work.

Udev rule not working

Ask Fedora

soconfused (K k) January 3, 2024, 2:31pm 2

You should use “=” to assign a value, not “==”.

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Udev rule not working

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