iMX6 HDMI disable issue

[yurykazakevich]

Hi everyone.

According to the answer on that question How to disable HDMI when board is booted I tried to disable HDMI on my custom board based on the iMX6 cpu.

I added in the bootargs the following options: 'video=mxcfb0:off video=mxcfb1:off video=mxcfb2:off ' and as a result kernel hangs without any errors, oops and etc.

I get the same behavior when I disable frame buffer support in the kernel.

My kernel version is 3.14.28

What can be a reason of that?

Thanks

[jimmychan]

you may try to set the HDMI to fb0, then run this "$echo 1 /sys/class/graphics/fb0/blank" after linux is up.

[yurykazakevich]

Thank you, Jimmy.

That command helps but sometimes kernel still freezes. Maybe you know how to find a reason of that or how to find out?