Re: [PATCH v4] ata: libata: disable LPM for WDC WD20EFAX-68FB5N0 hard drives

[Damien Le Moal <dlemoal@kernel.org>]

On 5/6/25 2:09 AM, Mikko Juhani Korhonen wrote:
> ma 5.5.2025 klo 18.37 Niklas Cassel (cassel@kernel.org) kirjoitti:
> 
>> On Mon, May 05, 2025 at 10:58:22AM +0300, Mikko Juhani Korhonen wrote:
>>>>> On 5/1/25 05:36, Ioannis Barkas wrote:
>>>>>> It would be better to have more details on this since only the 2TB
>>>>>> model is targeted.
>>> I have two WD20EFAX-68FB5N0 and both behave consistently, unusable
>>> from 6.9.0 on as they just keep resetting the SATA link , but they
>>> have worked flawlessly with 6.8.x for a year and also now with the
>>> quirk applied.
>>> I have also tested a different WDC model with med_power_with_dipm on
>>> the same SATA port and there are no problems.
>>> But after you guys got suspicious I found there is in fact a SATA port
>>> on my motherboard where the WD20EFAX-68FB5N0 works with LPM on
>> This motherboard looks to be AMD chipset, so I assume AMD AHCI controller.
>>
>> Could you send the output of:
>> $ lspci -nn | grep -E "SATA|AHCI"
> 
> mjkorhon@taavi:~$ sudo lspci -nn | grep -E "SATA|AHCI"
> 01:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] 500
> Series Chipset SATA Controller [1022:43eb]

Mikko,

Can you share a dmesg output for the good case with 6.8.x kernel ?
We would like to see differences with the non-working case.

-- 
Damien Le Moal
Western Digital Research