Duplicate color profiles. On 2023-10-17, after upgrading to Sonoma on Mac mini with M1 chip, I, too, had screen flickering. I deleted the duplicate files in ~/Library/ColorSync/Profiles/ and the problem ceased. See this link:

Duplicate color profiles? On 2023-10-17, after upgrading to Sonoma on Mac mini with M1 chip, I, too, had screen flickering. I deleted the duplicate files in ~/Library/ColorSync/Profiles/ and the problem ceased. See this link: