There is no HDMI sound output when I choose 1024x768

[jiangshao]

I have a customized imx6dl sabresd board（Android4.2.2）。

I refered to imx6dl HDMI can't support 1024x768 ,  and now I can get 1024 x768 resolution through HDMI。

But there is no HDMI sound output when I choose 1024x768。

（If I choose 720p，There is sound output through HDMI）

I want to know why, and how to fix it?

[igorpadykov · Accepted solution]

Hi Jiang

strictly speaking 1024x768 is not supported by HDMI module

according to sect.33.4.3 Supported Video Mode i.MX6DQ Reference Manual

http://cache.nxp.com/files/soft_dev_tools/doc/support_info/iMX6DQPRM.pdf

So there may be issues with audio, as HDMI audio playback depends on HDMI pixel clock.

Best regards

igor

[jiangshao]

Thank you for your reply.

[mike_susen]

Hi Jiang,

please see this document HDMI Audio Setting

Michal