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I've connected an external Display to my MacBook M2 (2023) using a KVM-Switch via the USB-C Port.
It worked fine until I updated from 13.3 to 13.3.1 this morning. Now the display is not recognized anymore.
It still works if I connect it directly without the KVM switch.
Any ideas what could cause this or how to resolve it?
MacBook, OS X 10.11
Wish issues like this would be fixed before rolling out the system updates to the public because now I'm stuck in my office in the middle of day, with no working computer because my display isn't receiving an image from my Mac Mini.
I have a MacBook Pro 13-inch, M1, 2020 and after upgrading to Ventura 13.3.1 my External display LG 32UP550-W isn't detected anymore via directly attached USB-C. HDMI via SATECHI hub is working still.
I've set "Allow accessories to connect" to "Automatically When Unlocked".
I tried force detecting the Display in the Displays configuration by holding the option key (then Detect Displays shows) and clicking on it. This seems to be a broader problem impacting a lot of folks.
Cheers
[Update - Solved issue] - I reset my LG 32UP550-W by pressing the menu button under the LG Logo -> Settings -> General -> Reset to Initial Settings. My screen was connected with USB-C and instantly started working.
Hope this helps
This is happening to me as well, on a 2021 M1 MacBook Pro after upgrading to 13.3.1 last night. I am not using a switch or adapter; the display doesn't work when plugging the USB-C directly from my external monitor (a Dell 5K something or other) to my computer. It was working fine on 13.3.
I had to plug the KVM to the VGA port of the 2nd monitor and (via adapter) plug the USB-C directly from the Mac to the HDMI port of the monitor and switch the source of the monitor when I switch on the KVM. Hopefully this super janky workaround is only temporary until they fix this in 13.3.2 or 13.4.
For me resetting to Initial Settings does not solve it unfortunately
Updated to 13.4, still not working. This is getting really frustrating. All the while, customer support tries to tell me its KVMs fault when I have two PC and an old MacBook working fine on it.
Still broken in 13.5.
Seems like the 14.0 update finally fixed this. At least it worked for a couple of times now so there's hope.
External display connected to USB-C by a KVM-Switch not working since 13.3.1
