[antjanus]

I just got my first macbook in years. I legit thought something was wrong with my monitor (even though it works perfectly with my Windows desktop and my Linux laptop). So it's Big Sur??

[washadjeffmad]

I read that as Bug Sir, but I'm a little sleep deprived.

Apple announced MST support back during Sierra, and we still can't daisy chain on USB-C. Have to run each display to separate TB3 ports.

What I haven't tried is daisy chaining running Linux on a T2 Mac, which I don't know is possible yet. My enthusiasm for Apple's Intel-based hardware tapped out around 2014, though, so I'm calling anything pre-M1 a wash.

[Bud]

Could just as easily be your Thunderbolt dock (if you are using one) or adapter.

Most docks and a lot of the adapters out there completely suck.

CalDigit is perfect, though. No issues with my 2 external monitors on my 16" MBP since I got a CalDigit dock. Now I plug in one cable, and everything is kosher: 96W power, GigE, external speakers, 2 external hard drive arrays, and 2 monitors.

Was perfect under Catalina, and remains perfect under Big Sur.

[antjanus]

Yeah, that's the thing. I used my dock with both my desktop and laptop for months and it worked fine. _Still_ works fine. It's a 100W. If I plug it into my Macbook, it'll run the external display for like 10 seconds and shut it off. It's unfortunate :(

[Tsiklon]

Anecdotally, I use a Caldigit - but I get frequent AMD GPU driver kernel panics when I plug my laptops in, I see it on two separate 16" machines (work and personal). I suspect that it's the monitors at fault. Less common but no less annoying is when the machine doesn't pick up one of the two panels, forcing me to replug the laptop or panels in the dock (invariably increasing the likelihood of a panic...)

[apta]

Are you using and HDMI cable? I found it solved the issue when I switched to DisplayPort.