Since upgrading to Ventura, my external 5k (LG 49WL95C) monitor no longer works.
The screen goes completely garbled, I can see the mouse cursor, but everything else is completely distorted.
I have tried using a USB-C direct into the monitor, as well as a USB-C to DisplayPort. When I use a USB-C to and HDMI dongle, I can get it to work as a 4k.
MacBook Pro
HI, in case you're getting the issue of the garbled external display in macOS Ventura I just found a temporary solution:
sudo sleep 20 ; sudo kill -9 $(pgrep WindowServer)
I posted the same issue a few hours before this with a detailed list of steps I proceeded trying to solve the problem.
none of them worked. I also reviewed the etrecheck logs but I cant find any relation to my issues.
It seems like theres a problem with the graphics and/or display driver in normal mode. maybe its a problem with the usb-c controler as there are several people that they have similar issues with some usb-c hardware, which works quite well in the safe boot, but not in normal mode
This solution was found.
Essentially what is happening, WindowsServer is causing the issue. From my understanding is WindowsServer is what generates the graphics.
In the command, it sets a 20 second timer, after the 20 seconds, it is going to find and kill (stop) the WindowsServer process
Another poster recommended booting in to safe mode, then back into normal. When I booted into Safe mode, it worked! however, the enjoyment was short lived when I rebooted back into normal mode, back to a garbled mess.
I'm facing the exact same issue.
Using a DELL UltraSharp U4919DW on a 5120 x 1440 resolution.
After upgrade to macOS Ventura my screen got garbled as well.
I'm able to get the monitor working while in safe mode but after restarting normally facing the same issue.
I am using an M1 max macbook pro 16”. I have had 2 monitors and other peripherals attached to my computer via a Lenovo dock and a thunderbolt 4 cable. This rig has worked all year, up until this morning when I updated to Ventura 13.0. Now the computer does not recognise any external monitors, with or without dock. Cables, monitors and dock work on another computer just fine.
Things I have tried:
-Reboot
-Unplug monitors from wall
-Connect monitors via hdmi cable and no dock
-Connect monitors via DP to usb c cable and no dock
-Connect everything with dock (everything else including charging works as before but monitors are not recognised)
-Reinstall ventura
-Safe mode reboot
This used to be absolutely fine on mac os 12.6. Please hurry with a fix, I am not getting work done like this.
I have the exact same issue. When I switch to the external monitor, it flashes on for a second or two and then goes dark. Worked just fine under Monterey. Apple needs to fix this, ASAP. Clearly, a software/driiver issue.
Ha, I just found this command late last night and tried it this morning.
It works, however, my usb devices that are plugged into my monitor such as mouse and keyboard do not work... I guess I can't have it all!
I just installed the lastest 13.1 and still no fix. I also purchased a new thunderbolt 4 cable, and nope, still not working!
+1 I use a LG 49WL95C-WE monitor for work and now i'm affected by this.
No reply from Apple acknowledging this issue yet?
How long will they take to fix it? I'm pondering going back to Monterey at this moment...
I will revise my prior input to state that there are incompatabilities between Ventura and both my docking stations. These incompatibilities did not exist with Monterey.
Latest b. e. t. a. release still not working!
This is absolute rubbish from Apple at least give us a temporary solution
Ventura - External Displays not working
