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Workstation 16 waiting for connection

I am running Kubuntu 20.04 with a Windows 10 VM.  I'm using Workstation 16.2.1 build-18811642.  I cannot now start any virtual machine, including clones that I had saved some months ago. 

Here's the error message I get:

VMware Workstation unrecoverable error: (svga)

ISBRendererComm: Lost connection to mksSandbox (2713)

A log file is available in "/home/ddoernberg/vmware/Clone_5_19_20/vmware.log".

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I have attached the log file, but I have no idea how to interpret it.


Here's what I have done since the trouble began yesterday.


(1)  I replaced the VM with a clone from September, when everything was working well.  No joy.

(2) I uninstalled and reinstalled Workstation.  No joy.

(3) I purged and reinstalled Workstation (previous settings not saved).  No joy. 


I suppose I could go back to square 1 and reinstall the entire OS (creating a new host machine, essentially), but Kubuntu is working as it should with the exception of Workstation.  So the problem seems to be with Workstation rather than Kubuntu.


Truth in advertising:  I'm actually quite sure that the problem is with me, but I have no idea where to go from here.  I have backups of all my data, so although this is a major inconvenience, it is not an existential threat (that phrase being so popular these days).


Suggestions?  All thoughts welcome.

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The 16.2.0 and 16.2.1 version seems rather problematic on both Windows and Linux hosts.

You could try installing 16.1.2 version instead.


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