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Ventura external display problem

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A

ac360

macrumors member
Original poster
Oct 2, 2018
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I have a MacBook Pro 13 inch (2019) and a Samsung Odyssey 49" display. When connected via USB-C, the laptop's display and the external display become garbled and unusable. Sigh...

Update: Booting into safe mode (temporarily?) solved the problem. Displays not garbled at this time.
 
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I have a LG UN880 Ergo 32" display and it's not working over USB-C anymore. I connected it over HDMI, but the displays usb is useless now :-( If I cant fine a solution soon, I will go back to MacOS 12.6.
 
Hello, I have the same problem (M1 Pro 2020), my LG 31,5 4K is no longer working via USB-C, even it could not be charged.
 
I have MBP 2020 with a Dell U2723QE and while it is useable, the refresh rate doesn't seem right and seems very choppy. Can't see anyway of changing it in system preferences...
 
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I'm having the same issue with my LG 35WN75C.

Have any of you found a solution or is it time to roll back to Monterey?
 
I had a similar issue using a generic USB hub from Amazon connected to an LG 27" 27BL55U-B monitor. Based on this great post, if you left your hub connected during the software update, your hub might need to be completely powered off to do a power cycle. Basically I turned everything off and on again and I was able to connect the hub. My display, mouse, and keyboard are all operational.

However - I'm not getting my native resolution on my display so it looks like crap. I seriously regret updating this early, I should know better by now... :(

I'll leave a new post if I figure out the resolution issue.

Also, there is a new security setting in Ventura on USB accessories, but that wasn't the culprit at least for me.
 
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I tried booting into safe mode and the displays worked properly--under safe mode and not under safe mode.

Start up your Mac in safe mode

Starting up your Mac in safe mode may help you diagnose problems with your Mac.
support.apple.com
 
Glad it worked for you!

If I directly plug in directly from the monitor to my Mac's HDMI port I get full resolution, so I guess I'll stick with that and just use the hub for PD+mouse+keyboard. ¯\_(ツ)_/¯

I'm thinking my hub only supports 30 hz and something about Ventura is limiting the available resolutions. I guess I'll look into a new fancier hub - otherwise I have to plug/unplug twice every time I dock, which is obviously unacceptable. :p
 
Just joining this chat - I have a Panasonic TV monitor plugged in via the lightening cable directly into the back of my iMAC (Intel Chip). Worked perfectly well until updating to Ventura 13.0 so keen on a resolution - am GUTTED I did the update. Nothing even useful in it for me, but devastating to lose all that screen real estate now.
 
CaroU said:
Just joining this chat - I have a Panasonic TV monitor plugged in via the lightening cable directly into the back of my iMAC (Intel Chip). Worked perfectly well until updating to Ventura 13.0 so keen on a resolution - am GUTTED I did the update. Nothing even useful in it for me, but devastating to lose all that screen real estate now.
Click to expand...
Tell me you didn't back up with Time Machine without telling me you didn't backup with Time Machine, which even Apple's own recommendations advise you to do before updating to a new OS, just in case something critical for your workflow doesn't work anymore.

Try booting in safe mode, then booting again normally. It seems to have fixed it for some people.
 
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MajorFubar said:
Tell me you didn't back up with Time Machine without telling me you didn't backup with Time Machine, which even Apple's own recommendations advise you to do before updating to a new OS, just in case something critical for your workflow doesn't work anymore.

Try booting in safe mode, then booting again normally. It seems to have fixed it for some people.
Click to expand...
Hey @MajorFubar ... haha yes you got it - no time machine as I just lost the cord to my external drive (duh 🥱) but I've not lost anything at all - I keep everything in the cloud - simply the ability to work across my other screen.

Thanks - I've tried boot in safe mode, then again normally but nothing - as well as unplugging lightening cable, and power source to second screen. I'll try this again tonight however in case something changes. Thanks for the response!
 
CaroU said:
I've not lost anything at all
Click to expand...
What you've lost unfortunately is the ability to roll back to 12.6.
Never ever upgrade to a new OS without having a recent Time Machine backup if you connect your computer to any kind of external hardware except something safe and banal like wired headphones.

Hopefully your problem will be fixed by a future dot update.
 
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texasaggie13 said:
I had a similar issue using a generic USB hub from Amazon connected to an LG 27" 27BL55U-B monitor. Based on this great post, if you left your hub connected during the software update, your hub might need to be completely powered off to do a power cycle. Basically I turned everything off and on again and I was able to connect the hub. My display, mouse, and keyboard are all operational.

However - I'm not getting my native resolution on my display so it looks like crap. I seriously regret updating this early, I should know better by now... :(

I'll leave a new post if I figure out the resolution issue.

Also, there is a new security setting in Ventura on USB accessories, but that wasn't the culprit at least for me.
Click to expand...
MY LG UN880 didn't work. I try everything what I could think off. Yesterday I tried a different cable but still no luck. After that I connectet my HP Laptop from work on the display and it worked. After that I hooked up my MacMini again and it was working like before! :) Maybe I really just needs to fully power down everything or so.
Happy I don't need to downgrade.
 
I was having significant issues with my Dell U2722DE USB-C Hub 1440p monitor, for BOTH IPadOS 16 and Ventura. USB-C hub functionality worked, but the monitor would continually say no USB-C signal detected. Using the software power button on the monitor did not help, power cycling mac did not help, booting to safe mode did not help. However I hard-power-cycled the monitor by unplugging it from power for a few minutes, and then both the iPad and the mac could successfully use the USB-C DisplayPort connection as they had before. Hope this helps!
 
Similar issues for me on my M1 MBP. I have two monitors, a 27" 4K Dell and a 43" Ultrawide Electriq. The latter supports 120hz, but on Ventura this mode produces washed out colours, blurry fonts and icons and a lack of vibrancy. No amount of calibration or messing about will fix it.

Looks perfect in 60hz but I'm so used to 120hz that it's making me feel a bit queasy. Getting my house in order to roll back to 12.6.1.

Really disappointed by this.
 
Same here, and I use Apple's own Studio Display! The scrambling starts when waking the computer after having put the display to sleep. Sometimes I can fix it by repeatedly putting the display to sleep and waking it again and/or by reconnecting the display-cable to the MacBook Air.

It happened before that a section of the screen near the top remained scrambled (very thin strip left to right around the dropdown menu), which is irritating. A restart fixed it.

Problem definitely occurred first time after installing macOS Ventura ... hoping for a bugfix soon!
 
ac360 said:
I have a MacBook Pro 13 inch (2019) and a Samsung Odyssey 49" display. When connected via USB-C, the laptop's display and the external display become garbled and unusable. Sigh...

Update: Booting into safe mode (temporarily?) solved the problem. Displays not garbled at this time.
Click to expand...
My experience and fix:

I upgraded to Ventura two days ago and experienced the same thing. M1 Air, external 4K LG connected via HDMI>USB-C Apple OEM dongle. Unusable flickering at 1440, all content reduced to unreadably tiny sizes at 2160, and 1080 looked like crap. Apple CS advised me to wait for a patch.

Here's how I got the monitor back. Unplugged the monitor, opened DISPLAY SETTINGS, plugged the HDMI cable into the dongle. Ventura asked me to grant access to the USB-C device.

Set up external as a mirrored display, chose MORE SPACE for the resolution, then switched to EXTEND DISPLAY. Now it works.

But I'm afraid to unplug the external monitor, as I don't know if I'd have to go through these steps again if I do.
 
ac360 said:
I have a MacBook Pro 13 inch (2019) and a Samsung Odyssey 49" display. When connected via USB-C, the laptop's display and the external display become garbled and unusable. Sigh...

Update: Booting into safe mode (temporarily?) solved the problem. Displays not garbled at this time.
Click to expand...
I have the Mac Studio and same Display Samsung Odyssey 49" Curved. Having the exact same issue since my update this morning however safe mode does not help. Awful on Apples part here
 
Same problem with a Samsung g9 Neo & my 2017 MacBook Pro .. nothing worked until now. I guess we just have to wait for a patch then?
 
I have a method that always works for me to solve this problem with Ventura.

Connect the Mac to the external display, then close the "WindowsServer" process in Activity Monitor. But close the process with the Mac connected to the display. Starting the process again, after a few seconds everything works fine. You have to do this on every reboot.

No need to boot into safe mode

I explain it better here
 
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Thank you so much I have been experiencing this issue since the first public beta and this fix worked, now I can have my monitor properly scaled over hdmi leaving my display port connection available for direct usb c connection. This is the only fix that has worked for me in months! And it was easy! Please post this on relevant Reddit and apple support communities threads if you haven’t already.
 
I have a slightly different issue but probably related.
I have an M1 Mac Mini with a belkin thunderbolt dock and an ultrawide 49" LG monitor.
I got fed up with USB-C killing the USB speed I got from the monitor's outputs so switched to use display port from the belkin hub. Then connected the monitor over USB-C from the same hub and I get full resolution video + full speed USB.

Since Ventura my Mac won't show the monitor when I wake it in the morning. I have the HDMI output of my Mac Mini connected to a HDMI matrix which connects to an LG OLED TV, so I can get access to the computer on the TV.
No matter what I do my mac won't see the LG Monitor connected to the dock unless I restart it.

I realise now I haven't tried going back to USB-C, I can live with slow USB as long as my Mac is usable every morning. I'll try it tomorrow and come back with the result.
 
TC!! said:
I have a slightly different issue but probably related.
I have an M1 Mac Mini with a belkin thunderbolt dock and an ultrawide 49" LG monitor.
I got fed up with USB-C killing the USB speed I got from the monitor's outputs so switched to use display port from the belkin hub. Then connected the monitor over USB-C from the same hub and I get full resolution video + full speed USB.

Since Ventura my Mac won't show the monitor when I wake it in the morning. I have the HDMI output of my Mac Mini connected to a HDMI matrix which connects to an LG OLED TV, so I can get access to the computer on the TV.
No matter what I do my mac won't see the LG Monitor connected to the dock unless I restart it.

I realise now I haven't tried going back to USB-C, I can live with slow USB as long as my Mac is usable every morning. I'll try it tomorrow and come back with the result.
Click to expand...
I have the same problem - Ventura doesnt like external displays via Thunderbolt. Killing the Window Server process does nothing sadly ...
 
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