[ltp] VMware 4.0 serial port problem

[Ted Johansson]

Kang Tin LAI wrote:

> Hi,
>
> My system:
>
> 600E
> kernel 2.4.20 (slackware 9.0)
> vmware 3.2 w2k guest
>
> The serial port was working fine from w2k guest.
>
>
>
> After vmware upgraded to 4.0, connected a modem to serial port, and 
> open the Hyperterminal, set speed to 2400 and send an AT command, AT&V 
> for example, OK, change speed to 4800, OK but not very stable. For 
> higher speed, for example 9600, totally not working, an overrun 
> phenomenon found. I have tried to change the flow control, but no 
> improvement. I have to spend time to revert to vmware 3.2, then OK, 
> including 115200. Under linux, serial port is working fine with seyon.
>
> Anybody here with different system and experienced the same problem? 
> Is it a bug of vmware or just my system's problem.
>

Had the same problem on the desktop machine (MDK9.1, WinME guest). From
searching google, it appears to be a bug in vmware 4.0.

I added some parameter, as suggest on google, concerning the serial port
in the .vmx configuration file for the VM. I am not 100% sure, but I
think this is the entry:
serial1.yieldOnMsrRead = "TRUE" (for com1).
This reduced the problem to an acceptable level, but it is still
noticable and loads the VM considerably (WinME on 1800+ Athlon). There
were other parameters suggestions on goggle, but with no effect for me.


Regard,   Ted