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

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