Chapter 3: Troubleshooting - Dell XPS 17 9720 Connection Manual

3
Troubleshooting
8K displays cannot select 8K@60Hz
Question
When I connect an 8K display to the computer using a Thunderbolt or type-C cable directly, the display output only runs
8K@30Hz.
Cause
This is due to a hardware limitation (HDMI 8k@60Hz requires VESA DSC 1.2a PCON IC support which is not supported on the
system).
Workaround
The system is work as designed.
There is no display on the monitor while connecting the
monitor via Dell WD15 dock to the system
Question
When I connect a display monitor to the computer using a Dell WD15 Thunderbolt docking station with Direct Graphics
Controller Direct Output mode enabled (dGPU mode), there is no display output.
Cause
This is due to a hardware limitation on the Dell WD15 dock while Direct Graphics Controller Direct Output mode is enabled on
the system.
Workaround
Use default iGPU mode when connecting the Dell WD15 dock or use latest Dell WD19 or WD22 docking stations.
The display output resolution cannot reach 4K@60Hz while
connecting the display monitor with a HDMI-to-DP or DP-
to-HDMI dongle from the docking station to the system
Question
When I connect a display monitor to the computer using an HDMI-to-DP or DP-to-HDMI dongle from a Dell WD19/WD22
Thunderbolt docking station, the display output resolution cannot reach 4K@60Hz (only 4K@30Hz).
Cause
This is due to a hardware limitation while connecting dongles to the Dell WD19/WD22 (Limited Graphic bandwidth) Thunderbolt
docking station.
Workaround
Connect the monitor directly to the HDMI or DP ports on the Thunderbolt docking station.
12 Troubleshooting