DisplayLink 4k Dock Dual Monitor Set Up Not Working

nsgujuboy · 07-06-2023, 02:49 AM

I have two, almost identical dual monitor set ups, one of which works, one of which is not:

1) FIRST SET UP THAT DOESN''T WORK
Two (2) Acer R240HY monitors both connected to my HP Displaylink 4K dock via [monitors] HDMI --> DisplayPort [dock]
MacBook Pro (2018) Intel Chip on macOS Ventura 13.4.1
Note: Acer displays only have an HDMI port, no DisplayLink Port. Not sure if that matters.

2) SECOND SET UP THAT DOES WORK
Two (2) Dell P2219H monitor, one connected to my HP Displaylink 4K dock via a double sided HDMI cable and the other via a double sided DisplayPort cable.
MacBook Pro (2018) Intel Chip on macOS Ventura 13.4.1

The second set up works fine. My MacBook Pro detects both monitors in the display settings and is extending the display so that I can use both monitors separately. Upon connecting my MacBook Pro to my first set up that isn't working however, my MacBook displays content on BOTH monitors but the content is mirrored, not extended. In my display settings, it is only detecting one monitor. I've tried plugging and unplugging the monitors, ensuring the DisplayLink manager driver is up to date, and using a double-sided HDMI cable to connect one monitor to the dock instead of the HDMI --> DisplayPort to somewhat mimic my set up that works. Still no luck. My DisplayLink manager says "no Displaylink enabled monitor detected." Not sure if this has anything to do with (A) the Acer monitors being incompatible with the HP DisplayLink or my MacBook Pro or (B) the cables I am using affecting the setup (dual sided HDMI and DisplayPort cables for the set up that works vs two HDMI/Displayport cables for the set up that does not work). If I bypass the dock entirely for the second Acer monitor and instead plug a dual HDMI cable from the monitor into an HDMI to USBC adapter that goes directly into my MacBook Pro, the MacBook detects the monitor fine and I can extend the display.

If anyone has any insight into what's going on and how I can fix this issue please let me know. I am really hoping that I don't have to buy new monitors!

07-06-2023, 02:49 AM	#1
nsgujuboy Junior Member Join Date: Jul 2023 Posts: 2	DisplayLink 4k Dock Dual Monitor Set Up Not Working I have two, almost identical dual monitor set ups, one of which works, one of which is not: 1) FIRST SET UP THAT DOESN''T WORK Two (2) Acer R240HY monitors both connected to my HP Displaylink 4K dock via [monitors] HDMI --> DisplayPort [dock] MacBook Pro (2018) Intel Chip on macOS Ventura 13.4.1 Note: Acer displays only have an HDMI port, no DisplayLink Port. Not sure if that matters. 2) SECOND SET UP THAT DOES WORK Two (2) Dell P2219H monitor, one connected to my HP Displaylink 4K dock via a double sided HDMI cable and the other via a double sided DisplayPort cable. MacBook Pro (2018) Intel Chip on macOS Ventura 13.4.1 The second set up works fine. My MacBook Pro detects both monitors in the display settings and is extending the display so that I can use both monitors separately. Upon connecting my MacBook Pro to my first set up that isn't working however, my MacBook displays content on BOTH monitors but the content is mirrored, not extended. In my display settings, it is only detecting one monitor. I've tried plugging and unplugging the monitors, ensuring the DisplayLink manager driver is up to date, and using a double-sided HDMI cable to connect one monitor to the dock instead of the HDMI --> DisplayPort to somewhat mimic my set up that works. Still no luck. My DisplayLink manager says "no Displaylink enabled monitor detected." Not sure if this has anything to do with (A) the Acer monitors being incompatible with the HP DisplayLink or my MacBook Pro or (B) the cables I am using affecting the setup (dual sided HDMI and DisplayPort cables for the set up that works vs two HDMI/Displayport cables for the set up that does not work). If I bypass the dock entirely for the second Acer monitor and instead plug a dual HDMI cable from the monitor into an HDMI to USBC adapter that goes directly into my MacBook Pro, the MacBook detects the monitor fine and I can extend the display. If anyone has any insight into what's going on and how I can fix this issue please let me know. I am really hoping that I don't have to buy new monitors!