10.10.3 Blank Screen after update from 10.10.2
 

My system was working fine until an Apple update in late March or early April. Now my Displaylink monitor is blank. The screen maps in my system settings, and I can move my mouse to the screen (although I can't see the mouse)

I uninstalled and reinstalled the 2.4.1b software, but still not working.

My DisplayLink device works because I tested it on another of my MacBook Pros.

I attached the log file. Hopefully I used it correctly to gather the needed info.

thx

Hi Kevin,

We have spotted a possible problem on this specific system: you have a kernel extension called vhhcd.kext that has created similar issues for a different user.

It seems to be connected with a SW called VirtualHere. Could you try uninstalling the vhhcd.kext kernel extension and check if the issue is still there?

Best regards,
Carlo

That fixed it
 

Works after removing the kext file.

Now the question is whether the issue is DisplayLink or VirtualHere. Any thoughts? I will contact VirtualHere as well.

thx.

@Carlo: Im a developer from virtualhere. if you know the conflict with your driver let me know and ill make a fix to my driver if its something to do with vhhcd. I suspect you are polling the system for all USB Host Controllers and are only expecting Apple ones and your system then stops the polling...just a guess...Michael

Thank you Michael,
Yes that's the kind of issue we would have expected but it is much more weird than that! We'll contact you directly.

Cheers,
Carlo

OK this is now confirmed fixed in 2.9.5 of the virtualhere client.

Thank you Michael,

This was a fast workaround!

Cheers,
Carlo