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Old 09-20-2017, 04:54 AM   #1
YuZhang
Junior Member
 
Join Date: Sep 2017
Posts: 3
Default DisplayLink doesn't work when intel_iommu is enabled

I have a DisplayLink product, i.e., a WAVLINK multi-display HDMI adapter, i.e., USB3.0 to HDMI converter.
I run Ubuntu16.04.1 on i3-6100U machine. I need to turn on intel_iommu, however, it seems as if DisplayLink is not compatible with intel_iommu. When intel_iommu is enabled(intel_iommu=on), the extended monitor (DVI-I-1-1) doesn't work. It keeps a black screen while the primary monitor is in a bad status of very low resolution. There is one similar thread on the forum. But the solution is not useful for me since I need to enable intel_iommu but not to disable it.
(http://displaylink.org/forum/showthr...ighlight=iommu)
Could anyone tell me how can I use DisplayLink with intel_iommu enabled?
I have attached the log files collected by DLSupportTool.

Thanks.
Attached Files
File Type: zip DisplayLink_2017-09-20T10%3A58%3A51.249506.zip (714.4 KB, 0 views)
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Tags
black screen, intel_iommu, low resolution, ubuntu16.04.1

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