F5F Stay Refreshed Hardware Desktop Problème de branchement en série entre deux écrans LG UltraFine 4K de 2x avec l'ordinateur portable M1 Pro.

Problème de branchement en série entre deux écrans LG UltraFine 4K de 2x avec l'ordinateur portable M1 Pro.

Problème de branchement en série entre deux écrans LG UltraFine 4K de 2x avec l'ordinateur portable M1 Pro.

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onestostubbs
Junior Member
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06-23-2016, 03:22 AM
#1
I own two LG Ultrafine 4K monitors: 24MD4KL. They’re connected to my M1 Pro MacBook Pro via a Thunderbolt 3 cable. Each works fine when plugged in separately, but they don’t function together when daisy chained. The monitor’s site claims support for Thunderbolt daisy chaining, and both have two Thunderbolt ports at the back, yet I can’t connect them properly. When playing music, I switch audio between the two monitors and it works, so detection is confirmed. There’s no display on the linked monitor. I used a Thunderbolt 3 cable and checked the speed in a screenshot to rule out bandwidth issues. Any advice or troubleshooting help would be greatly appreciated.
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O
onestostubbs
06-23-2016, 03:22 AM #1

I own two LG Ultrafine 4K monitors: 24MD4KL. They’re connected to my M1 Pro MacBook Pro via a Thunderbolt 3 cable. Each works fine when plugged in separately, but they don’t function together when daisy chained. The monitor’s site claims support for Thunderbolt daisy chaining, and both have two Thunderbolt ports at the back, yet I can’t connect them properly. When playing music, I switch audio between the two monitors and it works, so detection is confirmed. There’s no display on the linked monitor. I used a Thunderbolt 3 cable and checked the speed in a screenshot to rule out bandwidth issues. Any advice or troubleshooting help would be greatly appreciated.

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MilkIsAwesome
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06-23-2016, 06:39 AM
#2
I only noticed that you connected the second monitor to the displayOut port of the first one, and it functioned properly. They were also using Thunderbolt, but the monitor needed to support DisplayPort Daisy Chaining with the right cable. It seems the "appropriate cable" might not be a standard Thunderbolt or USB-C connection. Hope this clarifies things.
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MilkIsAwesome
06-23-2016, 06:39 AM #2

I only noticed that you connected the second monitor to the displayOut port of the first one, and it functioned properly. They were also using Thunderbolt, but the monitor needed to support DisplayPort Daisy Chaining with the right cable. It seems the "appropriate cable" might not be a standard Thunderbolt or USB-C connection. Hope this clarifies things.

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