BBB and HDMI to VGA adapter: the monitor goes in standby after few seconds.

Hi all,

first I have to say that I searched long about this argument: there are many posts about it, but still it is confusing to me! :frowning:

I bought an HDMI to VGA adapter that it is internally powered with micro USB. This is needed because the BBB cannot provide the required current.

When I power up the BBB I can see the Beaglebone logo: that means to me that the connection is fine, but after few seconds the image disappear and the monitor goes in standby. I tried with different VGA monitors and the behaviour is the same.

I cannot figure out how to solve this problem, someone has found a solution?

Thank you very much,

Alessandro

have you ssh’ed into the BBB and check the X.log.0 file to determine what resolution it might be running at?
Just a guess but maybe there’s a mismatch between what the BBB is driving and what the VGA display can show. If that’s the case, then you might try setting the video mode on the kernel options line in xInit.txt.

Doug

I was incorrect in stating that the “video=” option of optargs in xInit.txt would effect runtime video resolution. It will only effect the boot time resolution and that seems ok since you see the initial boot logo.

I would still check the /var/log/Xorg.0.log file for what the current resolution is and if that is beyond what your display can handle.
You might also want to look at this:
http://elinux.org/Beagleboard:BeagleBoneBlack_HDMI#Forcing_A_Resolution

Doug