Troubleshooting • Re: Only Bootloader Posts on monitor. Os does not.

Plugged via VGA through a micro HDMI adaptor

I suspect the HDMI to VGA adapter is not providing any EDID data, so the Raspberry Pi OS may be defaulting to a resolution that cannot be displayed. The diagnostic screen probably has a default that can be displayed okay.

You will likely need to manually set a sensible resolution (as you've tried), however:

Tried safe graphics.
Tried HDMI group 2.
Tried HDMI modes.

These settings are all legacy and will no longer work on Bookworm or Trixie:

https://www.raspberrypi.com/documentati ... eo-options

The new method of setting video parameters can be found here:

https://www.raspberrypi.com/documentati ... splay-mode

Statistics: Posted by phattmatt — Sat Dec 27, 2025 11:40 am

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