Got my Hypno (Pi4 version) brand new today. Unfortunately it does not boot up properly when connected via. AV breakout cable. I changed the
Still the lights of the hypno stay off when i connect it to power and the av output shows the output shown in this video: WhatsApp Video 2024-05-13 at 16.35.15.mp4 - Google Drive
what should i do?
Hi,
If you’d like to change the composite video out settings on the Pi4, try this guide externally:
== Video options
=== HDMI mode
In order to support dual 4k displays, the Raspberry Pi 4 has updated video hardware, which imposes minor restrictions on the modes supported.
The HDMI settings used to be configured by firmware via settings in `config.txt`; now the settings are configured by KMS via xref:configuration.adoc#hdmi-configuration[settings] in `cmdline.txt`.
==== HDMI Pipeline for Raspberry Pi 4 and 5
In order to support dual displays and modes up to 4k60, the Raspberry Pi 4 and 5 generate 2 output pixels for every clock cycle.
Every HDMI mode has a list of timings that control all the parameters around sync pulse durations. These are typically defined via a pixel clock, and then a number of active pixels, a front porch, sync pulse, and back porch for each of the horizontal and vertical directions.
Running everything at 2 pixels per clock means that the Raspberry Pi 4 and 5 cannot support a timing where _any_ of the horizontal timings are not divisible by 2. The firmware and Linux kernel filter out any mode that does not fulfil this criteria.
There is only one incompatible mode in the CEA and DMT standards: DMT mode 81, 1366x768 @ 60Hz. This mode has odd-numbered values for the horizontal sync and back porch timings and a width that indivisible by 8.
If your monitor has this resolution, Raspberry Pi 4 or 5 automatically drops down to the next mode advertised by the monitor; typically 1280x720.
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