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?! Interesting... hdparm -Y puts the drive to sleep while the revert puts the drive in standby state. Sleep is a near complete shutdown of the drive, while standby is not. In any case, I think something else is causing this. Probably PCI or ACPI related changes. So a bisect would be needed to understand this. But this is going to be very painful to do for this as each test take a while I guess ? How long do you need to wait to see the system going into low power state (when it is working that is) ? Also, which kernel version is the last one you know is OK ? > dmesg: > https://pastes.io/1vmmvhvfub > Regards > Dieter > *Gesendet:* Dienstag, 23. Januar 2024 um 12:52 Uhr > *Von:* "Damien Le Moal" <dlemoal@xxxxxxxxxx> > *An:* "Dieter Mummenschanz" <dmummenschanz@xxxxxx>, linux-ide@xxxxxxxxxxxxxxx > *Betreff:* Re: Aw: Re: [PATCH 0/2] Power management fixes > On 1/23/24 20:40, Dieter Mummenschanz wrote: > > Damien, > > sorry for getting back to you so late. So is this patch series just a revert or > > is it something new? Can I patch and test against 6.8-rc or should I use 6.7? > > Anyway I need at least a couple of days since I'm very busy ATM. > > Yes, the second patch is essentially a revert. If you can test with 6.8-rc1 it > would be great. > > Thanks. > > -- > Damien Le Moal > Western Digital Research -- Damien Le Moal Western Digital Research
