[ezschemi]

I am running a 16" MacBook Pro (2019), M1 MacBook Air and an 14" MacBook Pro with M1 Max. The latter is my daily driver for work, and personal computing. Monitors: - Eve Spectrum 4k 144Hz - HP Z25XS (2560x1440) - HP Z27k 4k - Some old 24" 1920x1200 HP monitor - CForce CF015 portable monitor

All the monitors work fine with all the Macbooks. To my surprise, even the Adaptive Sync with 144Hz works on the Eve Spectrum monitor. Even the scaling at 4k is fine: 4k scaled to 2560x1440, which is okay at 27". The laptops are connected either via Thunderbolt 4/USB-C cables (OWC 2m cable and the cables came with the monitors) or a OWC Thunderbolt 4 dock (and USB-C or Thunderbolt from there). The exception is the 24" monitor, which is connected via DP whenever I need it.

Like others here, I found that Thunderbolt 4/USB-C works best. My setup had similar issues with waking up and connecting the monitors when I used a mixture of HDMI and DP. Since switching, no more issues. The switch was expensive though :(

The work-issued Lenovo P15s Gen2, on the other hand, has all kinds of issues with this same setup: scaling in Windows 10 is crap and blurry depending on the application, monitors blank out every once in a while, going from 60Hz to 144Hz is a flickering nightmare, sleep and waking up just don't work, ...