>> Do you have an idea or solution?
>Have a look at the power loss control bits inside the superio chip. They
>specify what to do when the mainboard gets its standby power.

Okay, but how please?
I find things that seem interesting to me:

cat /coreboot/src/mainboard/asrock/e350m1/buildOpts.c | grep POWER
//#define BLDOPT_REMOVE_LOW_POWER_STATE_FOR_PROCHOT TRUE
#define BLDCFG_VRM_LOW_POWER_THRESHOLD          24000
#define BLDCFG_VRM_NB_LOW_POWER_THRESHOLD       1
//#define BLDCFG_PLATFORM_POWER_POLICY_MODE       Performance
#define BLDCFG_MEMORY_POWER_DOWN                TRUE
#define BLDCFG_POWER_DOWN_MODE                  POWER_DOWN_BY_CHIP_SELECT
/* POWER_DOWN_MODE */
#define POWER_DOWN_BY_CHANNEL                0 ///< Channel power down mode
#define POWER_DOWN_BY_CHIP_SELECT            1 ///< Chip select power down mode

Thanks, best regards

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