+ Shyam and Basavaraj for comments
On 5/7/2025 3:59 AM, Niklas Cassel wrote:
On Mon, May 05, 2025 at 08:09:44PM +0300, Mikko Juhani Korhonen wrote:
ma 5.5.2025 klo 18.37 Niklas Cassel (cassel@xxxxxxxxxx) 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]
Hello Mario,
We are seeing some LPM issues with an AMD AHCI controller when using a
(fairly recent) WD drive (so I would be slightly surprised if LPM wasn't)
implemented correctly.
The AMD AHCI controller is however something that I haven't seen before:
AMD 500 Series Chipset SATA Controller [1022:43eb]
For AMD, I have mostly seen:
PCI_VDEVICE(AMD, 0x7800)
PCI_VDEVICE(AMD, 0x7801)
PCI_VDEVICE(AMD, 0x7900)
PCI_VDEVICE(AMD, 0x7901)
I have never seen any 0x43eb before.
Is this AHCI chip less common than the others?
We did add a quirk that disables LPM (when used with Samsung drives) for
ATI AHCI controllers recently:
https://lore.kernel.org/linux-ide/20250317170348.1748671-2-cassel@xxxxxxxxxx/
Could perhaps this 0x43eb be a rebranded ATI AHCI controller?
Looking up this controller it seems that it should be part of chipsets
starting in ~2019.
Somewhat a shot in the dark but could this maybe also be fixed by
https://lore.kernel.org/linux-pci/20250424043232.1848107-1-superm1@xxxxxxxxxx/
That was specifically with storage attached to the chipset on desktops
instead of to the APU.
If we had LPM problems with AMD 0x78XX/0x79XX AHCI controllers,
I'm quite sure that we would have seen way more bug reports by now.
Kind regards,
Niklas
