By git bisect on linux-stable kernel tree I got to commit 0c8b7991f40d ata: libahci: Correct setting of DEVSLP register This suggested future research and I realized, that laptop-mode-tools sets drivers to lowest power mode which has setting BATT_SATA_POLICY=min_power in /etc/laptop-mode/conf.d/intel-sata-powermgmt.conf Above mentioned commit enables DEVSLP in this mode. Moreover this kernel has 'med_power_with_dipm' setting which is near 'min_power' but without DEVSLP. -- Tomáš 'ebík' Ebenlendr PF 2018.85211022324
Attachment:
pgpme27OY_SCK.pgp
Description: OpenPGP digital signature