Skip to content
This repository has been archived by the owner on Aug 26, 2024. It is now read-only.

Add a troubleshooting entry for no monitor display #14

Open
itsderek23 opened this issue Feb 28, 2020 · 4 comments
Open

Add a troubleshooting entry for no monitor display #14

itsderek23 opened this issue Feb 28, 2020 · 4 comments
Assignees

Comments

@itsderek23
Copy link
Contributor

Initial draft:

Nothing is displayed when the RPi Compute is connected to a monitor.

The RPi may be unable to detect a connected monitor if it is in power-save mode. When this occurs, the RPi enters headless mode (no HDMI drive). Ensure the monitor is awake and active when the RPi is booting so it can detect the monitor.

/cc @Luxonis-Brandon

Background

See this Slack Community thread.

image

@Luxonis-Brandon
Copy link
Contributor

LGTM. So one note on a technical side: I'm not sure if perhaps there exists a setting in Raspberry Pi that like 'force assumes' a monitor is present. May be worth googling at some point.

@itsderek23
Copy link
Contributor Author

itsderek23 commented Feb 29, 2020

I'm not sure if perhaps there exists a setting in Raspberry Pi that like 'force assumes' a monitor is present.

Good point! Via this SO question:

Add these two lines to /boot/config.txt and reboot Raspbmc:

hdmi_force_hotplug=1
hdmi_drive=2

hdmi_force_hotplug=1 sets the Raspbmc to use HDMI mode even if no HDMI monitor is detected. hdmi_drive=2 sets the Raspbmc to normal HDMI mode (Sound will be sent if supported and enabled). Without this line, the Raspbmc would switch to DVI (with no audio) mode by default.

We can mention this as well.

@Luxonis-Brandon
Copy link
Contributor

Sweet, thanks. So we'll add this to new default Raspberry Pi images for next shipments. CC: @Luxonis-Brian .

Still good to have this on the site - particularly in the future so that folks can disable it if they want to save power/etc.

@VanDavv VanDavv self-assigned this Jul 28, 2021
@VanDavv
Copy link
Contributor

VanDavv commented Jul 28, 2021

I'll add this section, would definitely be helpful when someone instead of a working product would see just a blank screen - very frustrating. Assigning myself to keep track, will circle back with PR

Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in.
Projects
None yet
Development

No branches or pull requests

3 participants