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

Eric
2025-03-18T00:04:52Z

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@kernel.org/
>>
>>
>> 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