No sound, no signal to display till reconnect the cable - Mac mini M2

PetrKK wrote:

When I turn on my Mac mini M2, my Dell U3219Q monitor reports no signal. If I pull out and reinsert the USB-C cable, the display appears and everything works correctly, including waking up from sleep. However, if I turn off the Mac, the problem returns. Similarly, this happens with the 3.5mm jack to which I have speakers connected. Here, even putting the Mac to sleep causes the sound to come from the Mac mini, and if I want to hear it from the speakers, I have to pull out the jack and reinsert it. The sound then plays from the speakers just fine. Where is the error? Thanks

Mac mini, macOS 13.5

for your third party monitor...

If in doubt refer to the developers website; Support/Help/FAQ/known issues/compatibility /updates/uninstall:

Contact a third party vendor

Contact a third-party vendor - Apple Support

Dell Help and Support - Dell.com - Official Site

Dell U3219Q 31.5" 4K Monitor | Driver Details

Dell UltraSharp U3219Q Monitor User's Guide

The current stable release of Ventura including bug fixes, security updates is macOS Ventura 13.5.2

Keep your Mac up to date - Apple Support

Keep your Mac up to date - Apple Support