Latest version of VMWre Workstation doesn't work with Keyspan USB to RS-232 adapter...

[jdb2]

I have several Linux VMs on which I run CKermit to transfer data to and from my HP48 calculators. I've been using a Keyspan USA-19HS USB to 9-pin RS-232 adapter for years for this purpose with no problems. Now, with a recent update to VMWare Workstation, when I run Kermit and initiate a transfer the transfer fails after the maximum number of retries has been hit and I get a "Protocol Error".

I've tested the above with two different calculators, and two different Linux VMs with no change. I also tested it on a native Linux install on an Intel NUC and the transfer worked fine, so, this points to a problem with VMWare.

I've tried a Linux Mint 19.1 Tessa x64 VM and a Linux Mint 21.1 Vera x64 VM with no success.

I'm running on the latest version of Windows 10 64-bit and my VMWare version is 17.0.2 build-21581411 .

Any help would be appreciated.

jdb2

[jdb2]

Well, I just upgraded to VMware Workstation Pro 17.5.0 build-22583795 and I also updated the software and kernel in the Linux Mint 21.1 VM. At first I successfully completed a 9600bps Kermit transfer to one of my HP48GXs. Then, I tried it again and the transfer failed in the same was as described in my original post -- the Intel NUC running Linux Mint 19.2 x64 still has *no* problems - there's something wrong with VMWare.

Also, there's another symptom : VMWare will randomly lock up, usually when all the VMs are paused or powered off, and I'll have to kill the VMWare VMX process which will generate an error dialog that reads as follows :

"Transport (VMDB) error -14: Pipe connection has been broken."

Any help would be appreciated.

jdb2