Dell Vostro 5560 Instrukcja podłączenia wyświetlacza zewnętrznego - Strona 11

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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