X4 displays detected but only two showing


Arstinince

Member
Local time
10:45 AM
Posts
1
OS
win11
Hey all,

I'm trying to run a multiple display setup and haven't been able to find any info on my particular problem. I have 4 displays - 2 tvs, a gaming monitor, and the laptop display. I have two of the screens connected via a USB-C (output on lappy) Hub that has 2 HDMI cables on it, and the 3rd display via a HDMI output on my lappy.

So, Windows 11 detects all four screens, but refuses to send a signal to more than two of them. When I connect the third and fourth screens, there's a visual indication that it's been detected, AND it shows in shows the screen in display settings. I have extend desktop selected on all. Anyway, I'm not sure what's keeping it from working. The two displays that aren't working are the ones connected to the HUB btw.

In Nvidia control panel, it only shows the second monitor detected, so that's weird.

Anyone have any idea what's causing this and how to fix it?

Thanks in advance for any help!
 

My Computer

System One

  • OS
    win11
    Computer type
    Laptop
    Manufacturer/Model
    dell g3
    CPU
    i7 7700
    Memory
    16 gig
    Graphics Card(s)
    1660Ti
Welcome to the forum. Sorry no one has answered you sooner, but I just saw your post today. I would suspect that the issue lies in the USC-C hub. It's possible that even though the additional screens are detected , there is no video output getting to them. I'll bet if you remove the hub and connect one of the devices directly to the usb-c port with a usb-c to hdmi cable that you see video on that device. Hubs of all kinds can be problematic. I would think one transmitting video would be even more so. Is it a powered hub?
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 23H2 22631.3880
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 7080
    CPU
    i9-10900 10 core 20 threads
    Motherboard
    DELL 0J37VM
    Memory
    32 gb
    Graphics Card(s)
    none-Intel UHD Graphics 630
    Sound Card
    Integrated Realtek
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    1tb Solidigm m.2 nvme+256gb SKHynix m.2 nvme /External +512gb Samsung m.2 sata+1tb Kingston m2.nvme
    PSU
    500w
    Case
    MT
    Cooling
    Dell Premium
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    so slow I'm too embarrassed to tell
    Browser
    Firefox
    Antivirus
    Defender+MWB Premium
  • Operating System
    Windows 10 Pro 22H2 19045.3930
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 9020
    CPU
    i7-4770
    Memory
    24 gb
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    256 gb Toshiba BG4 M.2 NVE SSB and 1 tb hdd
    PSU
    500w
    Case
    MT
    Cooling
    Dell factory
    Mouse
    Logitech wireless
    Keyboard
    Logitech wired
    Internet Speed
    still not telling
    Browser
    Firefox
    Antivirus
    Defender+MWB Premium
Laptops fitted with USB-C multipurpose ports will often have limitations to the functions available on some or all ports - It is usually the Video support that is sacrificed.

This limitation is often related to the cost / designed purpose of the laptop [I am lucky it that My Dell XPS 17 has full feature support on all four Thunderbolt 3 ports, though I did pay handsomely for the "luck"]

The USB-C standard is in a state of flux as technically the USB-C standard only actually applies to the Connector system.- manufacturers can support other lower level transmission standards even down to USB2 or even Power charge only.

These limits are most often applied to hub and other ancillary components so even if the laptop supports the required function all items in the chain must also be fully compliant [probably to the Thunderbolt 3 or soon TB4 standard].

Possible test procedure
Check the specs on the laptop to see that it supports the transmission of Video of the format required by the monitor. and more importantly try each monitor individually in each port on the laptop, then repeat the test with one monitor in each, port with the hub in the chain.

Personally I would expect that the hub could be not compatible with the transmission of video, and assuming that the laptop is fully compatible will need replacing
 

My Computers

System One System Two

  • OS
    Windows 11 Pro x64 [Latest Release Preview] [Win11 PRO HighEnd MUP-00005 DD]
    Computer type
    PC/Desktop
    Manufacturer/Model
    Scan 3XS to my design
    CPU
    AMD RYZEN 9 7950X OEM
    Motherboard
    *3XS*ASUS TUF B650 PLUS WIFI
    Memory
    64GB [2x32GB Corsair Vengeance 560 AMD DDR5]
    Graphics Card(s)
    3XS* ASUS DUAL RTX 4060 OC 8G
    Sound Card
    On motherboard Feeding SPDiF 5.1 system [plus local sound to each monitor]
    Monitor(s) Displays
    32" UHD 32 Bit HDR Monitor + 43" UHD 4K 32Bit HDR TV
    Screen Resolution
    2 x 3840 x 2160
    Hard Drives
    3XS Samsung 980Pro 2TB M.2 PCIe4 4 x 8TB Data + Various Externals from 1TB to 8TB, 10TB NAS
    PSU
    3XS Corsair RM850x 850w Fully Modular
    Case
    FDesign Define 7 XL BK TGL Case - Black
    Cooling
    3XS iCUE H150i ELITE Liquid Cool, Quiet Case fans
    Keyboard
    Wireless Logitec MX Keys + K830 [Depending on where I'm Sat]
    Mouse
    Wireless Logitec - MX Master 3S +
    Internet Speed
    950 MB Down 55 MB Up
    Browser
    Latest Chrome
    Antivirus
    BitDefender Total Security [Latest]
    Other Info
    Also run...
    Dell XPS 17 Laptop
    HP Laptop 8GB - Windows 10 Pro x64 HP 15.2"
    Nexus 7 Android tablet [x2]
    Samsung 10.2" tablet
    Blackview 10.2 Tablet
    Sony Z3 Android Smartphone
    Samsung S9 Plus Smartphone
    Wacom Pro Medium Pen Pad
    Wacom Pro Small Pen Pad
    Wacom ExpressKey Remote
    Loopdeck+ Graphics Controller
    Shuttle Pro v2 Control Pad
  • Operating System
    Windows 11 Pro x64 [Latest release]
    Computer type
    Laptop
    Manufacturer/Model
    Dell XPS 17 9700
    CPU
    i7 10750H
    Motherboard
    Stock
    Memory
    32 GB
    Graphics card(s)
    Stock Intel + GTX 1650 Ti
    Sound Card
    Stock 4 speaker
    Monitor(s) Displays
    Stock 17" + 32" 4K 3840 x 2160 HDR-10
    Screen Resolution
    3840 x 2400 HDR touchscreen
    Hard Drives
    2TB M2 NVMe
    PSU
    Stock
    Case
    Stock Aluminium / Carbon Fibre
    Cooling
    Stock + 2 fan cooling pad
    Mouse
    Stock Trackpad +Logi Mx Master 3 or MX Ergo Trackball
    Keyboard
    Stock Illuminated + Logi - MX Keys
    Internet Speed
    950 MB Down 55 MB Up
    Browser
    Latest Chrome
    Antivirus
    BitDefender Total Security 2021
    Other Info
    Also use an Adjustable Support for Laptop and Adjustable stand for monitor
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