bigtreetech / bigtreetech/CB1

CB1 / HDMI5 Issue

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Description

I'm having an issue with the HDMI showing the wrong resolution. It sometimes have a blank screen after rebooting. I have changed HDMI cables with no luck. I have plugged the cables into my laptop & the screen shows the correct resolution fine. The board I'm using is a Manta E3 EZ.
This is my config setup. Any help would be appreciated. I have tried everything that I have came across on Google & Reddit. The only possible issue, I can come up with is the micro HDMI connection on the Manta E3EZ board.

![Image](https://github.com/user-attachments/assets/e5f7d2b6-25d4-47a1-8d31-b2a1060114bb)

Xrandr
![Image](https://github.com/user-attachments/assets/c5cac096-4436-45dd-bbd3-0edb16f88f3a)

System.cfg,

![Image](https://github.com/user-attachments/assets/40106cfd-2331-4f36-a054-3edbe0c68b10)

ArmbianEnv.txt

![Image](https://github.com/user-attachments/assets/5531340b-9946-4894-b81c-ee1c57850020)

Contributor guide

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Research direction

Start by reviewing the attached xrandr output, System.cfg, and ArmbianEnv.txt, then reproduce the display behavior across a reboot on the Manta E3 EZ board. Done means the HDMI output consistently shows the intended resolution without a blank screen; the issue does not identify a source file or test.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux
Domain
embedded-iot, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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