NO signal out from HDMI cap

LS-BBGreen

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Dec 24, 2020, 7:25:56 AM12/24/20

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Hi all.

Recently bought a BB Green, and after a while ordered an HDMI cap for.

Installed Debian 8.10 2018-02-01 4GB SD SeeedStudio IoT, updated and upgraded: no video out on the monitor from the HDMI cap, since the 1st boot not a character is displayed on the screen, the monitor says ever and forever "NO SIGNAL".

Btw the board is alive and normally managed by SSH.

Tried to change dipswitches position on the cap to change the adress with no luck.

Installed the jumper TP4 on the BBG and closed the pins, but no luck.

Has anyone a solution or must sentence the brand-new cap as broken?

Thanks for your support.

Luigi

Dennis Lee Bieber

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Dec 24, 2020, 2:10:45 PM12/24/20

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On Thu, 24 Dec 2020 04:25:56 -0800 (PST), in
gmane.comp.hardware.beagleboard.user LS-BBGreen

<mystrato1963-Re5J...@public.gmane.org> wrote:

>Hi all.
>Recently bought a BB Green, and after a while ordered an HDMI cap for.

A link to said cape, and its documentation would help.

>
>Installed Debian 8.10 2018-02-01 4GB SD SeeedStudio IoT

><https://debian.beagleboard.org/images/bone-debian-8.10-seeed-iot-armhf-2018-02-01-4gb.img.xz>,

>updated and upgraded: no video out on the monitor from the HDMI cap, since
>the 1st boot not a character is displayed on the screen, the monitor says
>ever and forever "NO SIGNAL".
>

The most likely suspect is that you need to install some sort of driver
for the cape, and possibly even modify uEnv.txt to load some device tree.

--
Dennis L Bieber

jonnymo

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Dec 24, 2020, 3:11:41 PM12/24/20

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Would this be the cape you are using?

https://wiki.seeedstudio.com/BeagleBone_Green_HDMI_Cape/

If you type 'dmesg' at the command prompt you should be able to see if there are any errors seen with the cape.

I would double check the install of the cape as well.

There is this note in the Seeed Studio forum though:

https://forum.seeedstudio.com/t/re-the-hdmi-cape-for-the-bbg/251093

Cheers,

Jon

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LS-BBGreen

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Dec 26, 2020, 10:39:14 AM12/26/20

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Hi Dennis & Jon, and many thanks for you replies.

At first glance it seems to me that the suggestions of Jon are the nearest to the solution.

Of course the cap is exactly the latest sold by SEEED, and I'm absolutely certain of the right installation.

In fact, as usual, the REALLY RELEVANT INFOS to use a new product are well cached and/or closed in the vault of the supplier, NOT CLEARLY SHOWED to the users... one must do the hunt for the treasure before can find a valid info: I've tried to make a search in the forum but I was not able to dig out the right post. Likely you were on my way...

Btw I'll try to collect all the stuff and infos needed (i.e. discover the fw release in my board and where find the latest one, dwnl the Linux 4.4.x distro, ecc): I will inform both of you if I'll achieve some success with your infos.