Any way to disable SATA Active Link Power Management?

English Hardware
1

Hello,

I would like to disable the „SATA Active Link Power Management” to see if the e-sata hot plug capability returns to my notebook with kernels 4.15+. Because I read that: “Setting ALPM to min_power or medium_power will automatically disable the “Hot Plug” feature.”

Without any effect I already tried this:

/etc/udev/rules.d/hd_power_save.rules

with

ACTION=="add", SUBSYSTEM=="scsi_host", KERNEL=="host*", ATTR{link_power_management_policy}="max_performance"

And tried this as optional kernel command line parameter:

ahci.mobile_lpm_policy=1

ahci.mobile_lpm_policy=0

Then rebooted in both cases.

But

# cat /sys/class/scsi_host/host*/link_power_management_policy

continues to give:

med_power_with_dipm

Did I something in the wrong way?
Are there any working ways to disable the “SATA Active Link Power Management”?

Thanks in advance for any help,

atskler