DELL XPS 15 9510 External Display Laptop User Guide

XPS 15 9510
External Display Connection Guide

Regulatory Model: P91F
Regulatory Type: P91F002
May 2021 Rev. A00

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

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Before you begin

You can connect up to three 4K external displays or one 5K, or one 8K or higher displays using the USB-C ports available on your XPS 15 9510. Before you begin, ensure that you check the ports available on your external displays and decide on the modes of connections.
NOTE: Regardless of a Discrete Graphics Controller (dGPU) on some models, all external displays are controlled by the Integrated graphics controller (iGPU).

Modes of connection

Depending on the connectors available on your external display, you can connect the displays to the Thunderbolt 4 USB-C port on your computer using: Thunderbolt 4 cables, adapters or docking stations USB-C cables, adapters, or docking stations
NOTE: To experience the full resolution supported by your external displays, use appropriate cables. For example, use DisplayPort or HDMI cables for 4K and above resolution.
  NOTE: USB-C or Thunderbolt docking stations can be used to connect external displays to the computer using a single USB-C cable while charging the computer. For more information about the types of docking stations available from Dell, see the knowledge base article 000124295 at www.dell.com/support.
  NOTE: USB-C adapters can also be used to connect external displays to the computer, though these do not allow power charging at the same time. For more information about the types of USB-C adapters available from Dell, see the knowledge base article 000125728 at www.dell.com/support.
USB-C and Thunderbolt 4 USB-C ports available on your computer:
NOTE: When connecting a display using an adapter or docking station, it is recommended that you connect the display to the docking station first and then connect the docking station to the Thunderbolt 4 USB-C port on your computer.

Turn off the computer display

There may be instances where you may want to turn off the computer’s display to connect to more external displays. You can turn off the display of your computer by using the Intel HD Graphics Command Center.
NOTE: Connect and configure at least one external display before disabling the computer display.
To turn off the computer’s display:

1. In the Windows search bar, type Intel Graphics Command Center and press .
2. Accept the Intel Graphics Command Center software license agreement.
3. On the Intel Graphics Command Center window, click Display. The list of active displays is listed under the Connected Displays section
4. Click the ellipsis (…) in the top-right corner of your primary display, then click Extend > Display 2.
5. Click the ellipsis (…) in the top-right corner of display 2, then click Make Display Primary. 6. Click the ellipsis (…) in the top-right corner of your computer’s display, then click Disable.

Connect external displays

You can connect up to three external displays to the USB-C ports or up to four external displays using the docking station on your computer.

Integrated graphics

Connecting external displays to XPS 15 9510
NOTE: When connecting a display using an adapter or docking station, it is recommended that you connect the display to the docking station first and then connect the docking station to the USB-C port on your computer.
With the computer, display turned on
You can connect up to three external displays directly to USB-C ports. Connect an external display directly to your computer by using a USB-C or Thunderbolt cable:

• Connect an external display using a USB-C to Thunderbolt/HDMI/DisplayPort adapter:
• Connect up to three external displays using a USB-C docking station or USB-C to Thunderbolt/HDMI/DisplayPort adapter:

With the computer, the display turned off
NOTE: Ensure that you turn off your computer’s display before connecting the external displays. For more information, see Turn off the computer display.
NOTE: Connect and configure at least one external display before disabling the computer’s internal display.

You can connect up to three external displays directly to the Type-C ports on your computer or you can connect the displays to the computer using the docking station.

• Connect three external displays directly to the two Type-C ports and the docking station:
• Connect up to four external displays directly to the WD19TB series docking station and then connect the docking station to the computer:

Troubleshooting

8K displays flickering
Question
When I connect two 8K displays to both Thunderbolt ports on the left side or the right side of the computer, they flicker when they run at a display rate of 60 Hz.
Cause
This may be because of interlacing or switching as the Thunderbolt controller has sent only part of the data, whereas the other one has to send the second part of the data synchronization may be a problem.
Workaround
Connect each 8K display to a Thunderbolt port on either side of the computer, for example, one 8K display to either Port on the left side, and the other to either Port on the right side. After doing so, power the displays off and on again.
8K displays not displaying correctly
Question
When I connect the 8K display to the computer using a Thunderbolt docking station, it disrupts the display of my computer. Cause
This may be because of a hardware limitation with the Thunderbolt docking station.
Workaround
Connect the 8K display directly to a Thunderbolt port on your computer. Power on the display and than turn off the power on the display.
Daisy chain two 4K monitors via WD19TB series cannot reach 4K resolution
Question
When two 4K display is connected by Daisy chain via WD19TB series docking station, it cannot reach resolution upto 4K *2 @60 Hz.
Cause
This is because currently, the Intel GFX driver disables Display Stream Compression (DSC) support.
Workaround

• Connect the two 4K displays by the non-Daisy chain method.
• Adjust both the 4K displays refresh rate to 30 Hz.

No display or Blank screen after display Multi-Stream Transport (MST) option is turned off via WD19/WD19TB/ WD19DC series docking stations
Question
When the display Multi-Stream Transport (MST) is tuned OFF via WD19/WD19TB/WD19DC series docking stations, the display does not power on or has a blank screen.
Cause
Multi-Stream Transport (MST) hub do not have any specific definition for handling or deal with this kind of DisplayPort Configuration Data (DPCD) change (eg: MST/SST, DP1.4/1.2, HDR, FreeSync).
Workaround

• Hot-Plug Dock cable.
• Hot-Plug Display cable.

4K display cannot reach 4K @60 Hz resolution if it is connected to a WD19TB series docking station via MFDP port.
Question
When a 4K display is connected to a WD19TB series docking station via Multi- Function DisplayPort (MFDP) USB Type-C connection, the display cannot reach 4K @60 Hz resolution.
Cause
According to DP Multi-Stream Transport (MST) DSC spec, DP stream is controlled during the blanking period and the size of those blanking periods gets affected by lot of factors including DSC (display stream compression) reported monitor support (modes, timings, RB1, RB2) and, Multi-Stream Transport (MST). Due to Intel limitation in this generation, DSC is disabled and hence it causes limitation with a small blanking period. If the blanking period is too small, there will be sufficient bandwidth for 4K @60 Hz resolution.
Workaround
Use Type-C to DisplayPort (DP) or HDMI dongle to output display as an alternative.

Getting help and contacting Dell

Self-help resources
You can get information and help on Dell products and services using these self-help resources:
Table 1. Self-help resources

www.dell.com
My Dell app|
Tips|
Contact Support| In Windows search, type contact support and press Enter.
Online help for operating system| www.dell.com/support/windows
Access top solutions, diagnostics, drivers and downloads, and learn more about your computer through videos, manuals and documents.| Your Dell computer is uniquely identified by a Service Tag or Express Service Code. To view relevant support resources for your Dell computer, enter the Service Tag or Express Service Code at www.dell.com/support.
For more information on how to find the Service Tag for your computer, see Locate the Service Tag on your computer.
Dell knowledge base articles for a variety of computer concerns| 1. Go to www.dell.com/support.
2. On the menu bar at the top of the Support page, select Support > Knowledge Base.
3. In the Search field on the Knowledge Base page. type the keyword, topic, or model number, and then click or tap the search icon to view the related articles.

Contacting Dell
To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell.
NOTE: Availability varies by country/region and product, and some services may not be available in your country/region.
NOTE: If you do not have an active Internet connection, you can find contact information about your purchase invoice, packing slip, bill, or Dell product catalog.

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