HDMI to DVI monitor problem

[joowonkim]

Hi everyone

I success install the Ubuntu i.MX6Q SabreSDB Board.

But not appear Ubuntu display.

I use the HDMI to DVI

I connected J8-HDMI connector and DVI monitor

How to solve this problem?

Thanks to read.

JooWon

[CommunityBot · Accepted solution]

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NXP Community!

[art]

I've been able to make the 1280x1024 DVI monitor (LG Flatron 1710) work with the i.MX6Q SDP board running L3.10.53 BSP through the HDMI output and passive HDMI->DVI adapter. To do it, I've added the new 'allow_noncea=1' environment variable in the U-Boot configuration and the following arguments to the kernel command line: 'video=mxcfb0:dev=hdmi,1280x1024M@60,if=RGB24'. The setup looked like following for my case of booting from external SD card on the SD3 (J507 connector on the board) interface.

U-Boot>setenv allow_noncea 1

U-Boot>setenv mmcargs 'setenv bootargs console=${console},${baudrate} ${smp} root=${mmcroot} video=mxcfb0:dev=hdmi,1280x1024M@60,if=RGB24'

U-Boot>saveenv

These settings forcedly fix the HDMI resolution to 1280x1024 and make the DVI monitor work correctly.

Have a great day,
Artur

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[CarlosCasillas]

Hi JooWon,

In case of the Yoctro images, they have the LVDS display enabled by default (and not the HDMI output).

In case of the SABRE-SD board, if you want to enable the HDMI monitor instead of the LVDS display, you could try the following: On the U-Boot command line:

   editenv mmcargs

Add the following to the end of the mmcargs variable:

   video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

   saveenv

   boot

You have to ensure that you added the mentioned command at the end of the mmcargs value, so, if you print the mmcargs values (command printenv mmcargs), it should be like following:

   setenv bootargs console=${console},${baudrate} ${smp} root=${mmcroot} video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

Hope this will be useful for you.
Best regards!
/Carlos

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