XPS-13笔记本Ubuntu17.10搭配DisplayLink1.4外接显示器无输出求助

Hey there, let's work through this DisplayLink issue together. From your command outputs, I can see two key things:

• Your DisplayLink device (17e9:ff10) is successfully detected by the system
• The evdi module (required for DisplayLink functionality) is loaded alongside your Intel i915 GPU module

That’s a solid starting point, but clearly something’s still preventing your monitor from displaying anything beyond the boot logo. Let’s try these targeted fixes:

1. Check DisplayLink Service Status #

First, make sure the DisplayLink system service is running properly:

systemctl status displaylink.service

• If the service shows failed or inactive, restart it with:

  sudo systemctl restart displaylink.service
  

• If it still won’t run, check the service logs for specific errors (like permission issues or missing dependencies):

  journalctl -u displaylink.service
  

2. Refresh and Configure the EVDI Module #

The evdi module is the bridge between DisplayLink and your system’s display stack. Let’s reset it and tweak its configuration:

• Reload the module to clear any temporary glitches:

  sudo rmmod evdi && sudo modprobe evdi
  

• If your system isn’t detecting the monitor automatically, force the module to initialize a display device. Create a config file:

  sudo nano /etc/modprobe.d/evdi.conf
  

  Add this line (adjust initial_device_count if you have multiple DisplayLink monitors):

  options evdi initial_device_count=1
  

  Save the file, then restart your system or reload the module again.

3. Verify Desktop Environment Display Settings #

Sometimes the system detects the hardware, but your desktop environment doesn’t enable the display:

• Open your desktop’s display settings (e.g., GNOME: Settings > Displays; KDE: System Settings > Display and Monitor)
• Look for a "Detect Displays" button and click it—this often triggers the system to recognize the external monitor
• If the monitor appears in the list, try switching between mirror/extended mode, or adjust the resolution and refresh rate to match your monitor’s specs

4. Check Driver-Kernel Compatibility #

DisplayLink drivers are tightly tied to specific Linux kernel versions. Run this to check your current kernel:

uname -r

Compare this version against the compatibility notes of the DisplayLink driver you installed. If they don’t match:

• Either upgrade/downgrade your kernel to a version supported by the driver
• Or download and reinstall the DisplayLink driver built for your current kernel

5. Test with Xorg (If Using Wayland) #

Many DisplayLink drivers have limited support for Wayland. If your system uses Wayland by default:

• Log out of your session
• On the login screen, click the gear icon and select an Xorg-based session (e.g., "GNOME on Xorg")
• Log back in and reconnect your DisplayLink monitor to test

If none of these steps resolve the issue, share the output of systemctl status displaylink.service and journalctl -u displaylink.service—that’ll help pinpoint the exact problem.

内容的提问来源于stack exchange，提问作者Tac Tacelosky