topic iMX6 HDMI disable issue in i.MX Processors

iMX6 HDMI disable issue

yurykazakevich — Tue, 13 Dec 2016 13:03:05 GMT

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

Re: iMX6 HDMI disable issue

jimmychan — Wed, 21 Dec 2016 08:26:54 GMT

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

Re: iMX6 HDMI disable issue

yurykazakevich — Wed, 21 Dec 2016 13:17:42 GMT

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?