imx6ul hangs exactly in 600 seconds after linux boot????

[alexanderyagodn]

Hello,

I encounter a weird problem with my custom imx6ul board.

The system boot normally (we are using Buildroot based solution) but hangs EXACTLY in 600 seconds after the OS takes its control.

U-Boot does not have such behaviour, it lasts until reset or power off.

I tried to rebuild Linux kernel in different ways, clocks, idle, power modes but there is no effect on it. 

Don't think it's a kind of HW issues, all power rails looks stable, clocks are preset.

Any ideas?

Thank you

[igorpadykov · Accepted solution]

Hi Alexander

this can be lcd automatic blanking

LCD turning white after a few minutes 

Best regards
igor
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[alexanderyagodn]

Hi Igor,

You are correct, this is LCD blanking! Thank you!

Regards,

Alexander