Have to unplug and re-plug

[awc782]

When my macbook pro m3 goes to sleep it does not connect to the external monitor after wake. The monitor seems to turn on but nothing is displayed and then the connection is lost. I then have to manually reconnect the monitor.

Some things I have tried:

• Doubling "Wake delay" to 3 seconds and 6 seconds
• enabled "Reinitialize this display on wake"
• enabled "Reinitialize external displays with smooth scaling enabled"

My monitor is a samsung crg9 ultrawide

[waydabber]

Do you have this issue when BetterDisplay is not running (so is it a BetterDisplay or a generic macOS issue)?

Sadly many displays have the "no signal" issue with macOS on wake that otherwise work fine on PCs - the problem is a Mac DCP firmware/hardware level issue and seemingly Apple could not fix these so far. You can try changing connections, since built-in HDMI is generally more problematic in this regard than USB-C/DP. If you need to use HDMI, as the CRG9 doesn't have DDC over DP, you can try third party USB-C to HDMI dongles, I have somewhat good experience countering this issue with VMM7100 based dongles running the available alternate firmware that allows high refresh rate.