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Precision 7780 and Docking station WD19DCS Display Ports does not work on Linux
Hey, I was trying to install Debian and Ubuntu on Precision 7780 with two external Dell monitors connected via DisplayPort to the docking station WD19DCS, but I can't set the resolution to more than 1027x768. Would appreciate any help. Thank you!
Tarvic
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Posted March 22nd, 2026 08:36
Add `i915.enable_dpcd_backlight=0` to the Linux kernel boot parameters, or update the graphics driver, and install the DisplayLink driver to support DisplayPort output on the Dell docking station.