Dell Vostro 5560 Instruction Manual

Dell Precision 5560
External Display Connection Guide
Regulatory Model: P91F
Regulatory Type: P91F001
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.
© 2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other
trademarks may be trademarks of their respective owners.

Chapter 1: Before you begin.......................................................................................................... 4
Modes of connection.......................................................................................................................................................... 4
Turn off the computer display..........................................................................................................................................5
Chapter 2: Connect external displays............................................................................................ 6
Integrated graphics............................................................................................................................................................. 6
Chapter 3: Troubleshooting......................................................................................................... 10
Chapter 4: Getting help............................................................................................................... 12
Contacting Dell................................................................................................................................................................... 12
Contents
Contents 3

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 Precision 5560.
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.
1
4 Before you begin

Turn off the computer display
There may be instances where you may want to turn off the computer's display to connect 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 <Enter>.
2. Accept the Intel Graphics Command Center software licence 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.
Before you begin 5

Connect external displays
You can connect up to three external displays to the USB-C ports or up to four external displays using the a docking station on
your computer.
Integrated graphics
Connecting external displays to Precision 5560
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:
2
6 Connect external displays

●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 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 internal display.
Connect external displays 7

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 than connecting the docking station
to the computer:
8Connect external displays

Connect external displays 9

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 send only part of the data, where 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 Ports on
the left side, and the other to either Ports 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 monitor 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 Intel GFX driver disables Display Stream Compression (DSC) support.
Workaround
●Connect the two 4K displays by non-Daisy chain method.
●Adjust both the 4K displays refresh rate to 30 Hz.
3
10 Troubleshooting

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 period 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 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 alternative.
Troubleshooting 11

Getting help
Contacting Dell
Prerequisites
NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing
slip, bill, or Dell product catalog.
About this task
Dell provides several online and telephone-based support and service options. Availability varies by country and product, and
some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues:
Steps
1. Go to Dell.com/support.
2. Select your support category.
3. Verify your country or region in the Choose a Country/Region drop-down list at the bottom of the page.
4. Select the appropriate service or support link based on your need.
4
12 Getting help