Hello Mikko, On Mon, May 12, 2025 at 01:34:38PM +0300, Mikko Juhani Korhonen wrote: (snip) > > Ok, so the bad 6.14.5 dmesg you shared before (where you got timeouts), > > was when using SATA ports 5,6 ? > > Yes, and you can see in the logs, ataX matches the motherboard's SATA > port number. > > > > So, if we really want to have a quirk which disables LPM only for ports 5-6, > > it would probably have to be a DMI quirk, which matches the motherboard name, > > see e.g.: > > https://github.com/torvalds/linux/blob/v6.15-rc6/drivers/ata/ahci.c#L1120-L1145 > > And even this would disable LPM for the case of > sata ports 5,6 -> WDC WD5000AAKX-001CA0 > which works now? Oh, that drive works on ports 5-6 ? I assumed that no drive that supports LPM worked on ports 5-6. (And that you simply reported WD20EFAX-68FB5N0 because that is what you had plugged in on that port originally.) So you are saying that: WD5000AAKX-001CA0 works with LPM enabled (lpm-pol 3), on port 5-6. but WD20EFAX-68FB5N0 gets timeouts with LPM enabled (lpm-pol 3), on port 5-6. That is weird indeed.
