On Wed, Jan 31, 2024 at 04:38:28PM +0900, Damien Le Moal wrote: > On 1/31/24 16:29, Dieter Mummenschanz wrote: > > Damien, > > so I've applied the patch to 6.8-rc2. Interesting thing is that the behaviour is > > exactly the same as before (w/o the patch). Besides not > > honoring CONFIG_SATA_MOBILE_LPM_POLICY=3 after boot my system refuses to > > transition into lower power states > pc2 after resume even after letting it sit > > idle for 10 minutes. Transition is only reached after issuing hdparm -Y. So if > > the patch restores the original behaviour then why did it stop working?! Hello Dieter, Just to confirm, while testing Damien's patch on top of 6.8-rc2, did you still do: for foo in /sys/class/scsi_host/host*/link_power_management_policy; do echo med_power_with_dipm > $foo; done It should be needed until we add (or modify the existing entry, if any) your PCI vendor and device id to use "board_ahci_low_power" instead of "board_ahci", see e.g. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/ata/ahci.c?id=b8b8b4e0c052b2c06e1c4820a8001f4e0f77900f Kind regards, Niklas
