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Old 09-16-2017, 06:25 PM   #1
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Join Date: Sep 2017
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Default evdi driver installs but apparently not being used

I was able to download and install the latest evdi driver, version 1.3.54.

I have secure boot turned off.

When I plug in my DisplayLink device, it appears that the regular udl driver is being used instead of the evdi driver: I see the device in lshw but with udl mentioned as the driver, and I don't see evdi in /proc/modules. In the display settings, the device shows up as a second monitor, but an attempt to turn it on fails. The device has a blank screen at all times.

Attaching the output of SupportTool.
Also attaching the output of lshw as lshw.out.txt.
Also attaching the result of cat /proc/modules as proc.modules.out.txt

My DisplayLink device is MIMO UM-760F

Attached Files
File Type: zip tim-Inspiron-15-3567_2017-09-16T09:59:24.794198.zip (44.1 KB, 0 views)
File Type: txt lshw.out.txt (18.0 KB, 0 views)
File Type: txt proc.modules.out.txt (7.5 KB, 0 views)
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Old 09-16-2017, 06:42 PM   #2
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Default Possible hot-plugging issues?

I restarted just now with the DisplayLink device plugged in. Ubuntu recognizes it and is using it as a second monitor.

Then I unplugged the USB cable and plugged it back in, and the computer locked up.

Restarted after the lock up with device plugged in. Again Ubuntu recognizes it and uses it as a second monitor.

Unplugged the USB cable. Computer locks up.

Restarted with device not plugged in. Plugged in device. Screen is black. Can now plug and unplug device without causing computer to lock up. With device plugged in, executed
sudo lshw
and computer locked up while I was examining the output.
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Old 09-18-2017, 12:24 PM   #3
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Posts: 386

Your device is not driven by the driver that uses evdi - this is only used by newer devices based on DL-3xxx/5xxx chips. You don't need to install anything at all.

udl is available in the kernel sources, should you need to examine what's happening, or diagnose problems.

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