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

[Eric]

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