igfxext module has stopped working
I have also found that this issue is tied to several of the other Lenovo components that are installed and their versions.
If you remove the Lenovo Power Manager tool software the issue seems to go away as well.
I had my Lenovo rep look into this issue too and he was able to correct it by loading specific driver/software version from both Lenovo and Displaylink, but he has not written up these items for me just yet.
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