Re: [BUG] SPD5118 Intermittent MR11 Corruption During Suspend/Resume

From: Armin Wolf

Date: Thu Sep 03 2026 - 18:47:30 EST

Am 03.09.26 um 23:05 schrieb Guenter Roeck:

Hi Matthew,

On 9/3/26 11:25, Matthew Bettencourt wrote:
Hello Guenter,

 > This system [MSI PRO B850M-A WIF/7600x3d] does _not_ have a problem, or did I misunderstand the above ?

That is correct. I was unable to replicate the issue with the MSI PRO B850M-A WIF and 7600x3d. The MR11 registered never got corrupted during sleep/resume and I never saw any piix4 errors logged when using my piix4 driver with the additional logging enabled.

I never swapped the CPUs as that was more hassle than I was willing to do right now, but if it something that might be useful I can probably try that at some point.

I don't think that would help. From all the reports I browsed through
so far, the common denominator seems to be that the affected systems use
a X870 or X870E chipset.

Anyway, couple of ideas:

- Do you have the latest BIOS installed on your system ?
  Some statements online seem to suggest that the problem
  _may_ be fixed with the latest BIOS on at least some
  of the affected systems.

- Please boot the affected system with "usbcore.autosuspend=-1"
  kernel command line parameter.
  There are some claims online that this might resolve the problem.
  I have no idea why that would be the case, but I guess it does
  not hurt trying. Of course, if that _does_ work, we have yet another
  mystery to solve.

- Do you have memory with RGB-anything in the affected system ? If so,
  is it controlled by the BIOS ? If yes, please disable the functionality
  if that is possible.

Thanks,
Guenter

According to the output of /proc/ioports, the root issue seems to be that the ACPI firmware
drives the SMBus controller and marks the affected IO ports as reserved, but acpi_check_region()
still tells the driver that the IO ports are available.

I already CCed the ACPI people to take a look at this.

Thanks,
Armin Wolf