Re: Regression from 7627a0edef54 ("ata: ahci: Drop low power policy board type") on reboot (but not cold boot)

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Hi Niklas, hi Hans,

Le 17/03/2025 à 20:15, Eric a écrit :
Hi Niklas,

Le 17/03/2025 à 18:09, Niklas Cassel a écrit :

I sent a patch that implements your original suggestion here:
https://lore.kernel.org/linux-ide/20250317170348.1748671-2-cassel@xxxxxxxxxx/

I forgot to add your Suggested-by tag.
If the patch solves Eric's problem, I could add the tag when applying.
I'll report back when the kernel with your proposed patch is built and tested on my system.

The test is a success as far as I am concerned. With this new patch, DIPM is disabled on the Samsung SSD, but not the Maxtor disk on the same controller :


(trixieUSB)eric@gwaihir:~$ sudo hdparm -I /dev/disk/by-id/ata-Samsung_SSD_870_QVO_2TB_S5RPNF0T419459E | grep "interface power management"
            Device-initiated interface power management
(trixieUSB)eric@gwaihir:~$ sudo hdparm -I /dev/disk/by-id/ata-MAXTOR_STM3250310AS_6RY2WB82 | grep "interface power management"
       *    Device-initiated interface power management


and the SSD is successfully detected at reboot by both the UEFI and the linux kernel.


Kind regards,
Niklas

Kind regards

Eric





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