HDMI is not working at all

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1

Hi friends,

Very disappointed… after several hours of trying, the HDMI output is not working.
The board has latest flash image 2013.09.04 as shipped, no modifications, no booting from SD.

In fact, I have nothing in

cat /proc/cmdline

root@beaglebone:~# cat /proc/cmdline
console=ttyO0,115200n8 quiet drm.debug=7 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait

where is the video argument?

I've tried all things kindly explained by this guy here:
http://bb-lcnc.blogspot.ro/2013/06/force-beaglebone-black-hdmi-resolution.html

I use a reasonable HDMI to VGA adapter:
http://www.delock.com/produkte/G_65347/merkmale.html?setLanguage=en

I even tried to pass arguments to u-boot but they don't appear after booting process
cat /proc/cmdline

setenv optargs video=HDMI-A-1:640x480@60

Any idea please ?!
2

Did you check for the troubleshooting section on the support Wiki?

http://www.elinux.org/Beagleboard:BeagleBoneBlack Look under HDMI.

DRM does not use the optargs. It only uses the EDID information it reads form the display to set the resolution.

Gerald

3

Did you check for the troubleshooting section on the support Wiki?

http://www.elinux.org/Beagleboard:BeagleBoneBlack Look under HDMI.

DRM does not use the optargs. It only uses the EDID information it reads form the display to set the resolution.

Gerald

I tried all the stuff on the Wiki without success.

When I added “optargs=quiet” to uEnv.txt

it suddenly started working.

Don’t ask me why.