STM32MP257F-EV1 build from 6.6.116 distribution package fails to boot from SD card

[ST Migration account]

This account only shares restored community content posted by members between May 22 and June 9, 2026, who did not register for the new community.

I've followed the build instructions for the STM32MP distribution package 6.6.116 and managed to build the boot sd card for MP135F-DK and that works fine.

When i build for MP257F-EV1 board, the build works fine and the boot sd card appears ok, but during boot it looks like the kernel load resets the processor partway through : 

[ 4.201246] m_can_platform 402f0000.can: m_can device registered (irq=76, version=32)
[ 4.204152] stm32-cryp 42030000.crypto: will run requests pump with realtime priority
[ 4.204774] stm32-pcie 48400000.pcie: IB MEM 0x0080000000..0x00ffffffff -> 0x0080000000
[ 4.221546] stm32-pcie 48400000.pcie: iATU: unroll T, 4 ob, 4 ib, align 64K, limit 4G
[ 4.255481] stm32-cryp 42030000.crypto: Initialized
[ 4.262966] Galcore version 6.4.21.1.1058597
NOTICE: CPU: STM32MP257FAI Rev.Y
NOTICE: Model: STMicroelectronics STM32MP257F-EV1 Evaluation Board
NOTICE: Board: MB1936 Var1.1 Rev.D-02
NOTICE: Reset reason: Power-on reset (por_rstn) (0x2035)
INFO: PMIC2 version = 0x11
INFO: PMIC2 product ID = 0x20

 

Anyone else come across an issue like this ?

 

[Erwan SZYMANSKI]

Hello  ,
This is not the expected behavior, this test works fine and is regularly tested on our side. Can you double check that your power supply is enough to supply the board properly ?

Do you compile the distribution package with all the default configuration, without any change in comparison with the wiki guidelines ?

A useful test you can do is to take the Starter Package for the STM32MP257F-EV1 board and try to flash your SD card from it, and see if you observe a difference.

Kind regards,
Erwan.

[ST Migration account]

Hey Erwan. That was indeed the problem, browning out with the latest software 6.2.0. Weirdly 6.1.0 did the same and 6.0.1 worked fine.
I guess something changed in power up order/requirements recently.

Thanks

S