VGA, HDMI, headphones/internal speakers

[rigr]

First of all, thanks Yusuf for providing all the info here.
I currently have two problems:

1. no external monitor is working - in windows both, the VGA and HDMI port, work fine, Ventura however does not show anything on the external screens, wherever I connect them.
2. when I plug in a headphone and pull it out later the internal speakers do not make any more sound. My "workaround" is starting again and delete NVRAM, then the speakers work again.

Do you have an idea what I can do to make all that work?

Thank you and best wishes
Richard

[rigr]

If needed - here is a link to my EFI folder - I just modified the serial in config.plist
https://drive.google.com/file/d/1cq442UumPIj5E2I4v63_dfSrZHmbRsqa/view?usp=sharing

[rigr]

I Installed Sonoma now (from Ventura) and still have the same issues. I'd really like to user an external monitor.