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Connecting Dell XPS 15 9550 to Acer X34 (Ultrawide 1440p @ 100 hz) using USB-C to Displayport cable
I am trying to connect my Dell XPS 15 9550 laptop to an Acer X34 monitor using this [USB-C to Displayport cable](www.amazon.com/.../ref=oh_aui_detailpage_o06_s00. I can use this cable for my previous monitor which was an LG 1440p ultrawide monitor with no issues (3440x1440 60hz). I am getting a "No signal" message when I use try to use this USB-C to Displayport cable with this monitor
DELL-Infant R
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July 21st, 2017 01:00
Hi,
Thank you for writing to the Dell Community Forum.
Please go to the system BIOS> System Configuration> USB/Thunderbolt Configuration. Please place the check mark for the below,
Enable USB Boot Support
Enable Thunderbolt ports
Always Allow Dell Docks
Enable External USB port
Then you may first try with Security level – No Security, if the issue persist try Security level – Display Port Only.
Also please the to the monitor settings and turn the Deep sleep mode off.
Kindly get back if there are any further queries.
For me to better assist in troubleshooting, please click my DELL-username and send me a Private Message with the Dell Service Tag number and your email address.