[Qemu-devel] Serial port strange behavior

["Aleš Rom" <ales.rom@kabelnet.net>]

Hello all . I'm new to this list.

A few days ago I asked on xen-users mailing list if xen and qemu serial 
driver code is related. Someone there confirmed that. After some digging 
and trying different serial port configurations I can say that  problem  
below is protocol related.
I hooked up two boxes with serial cable. First one is WinXP on real 
hardware, second one qemu (or xen) virtualized WinXP on FC6.
I started Hyper Terminal on both sides. Console communication is OK. 
Then I tried file transfer.

1. Real to virtual file transfer is good, other way not possible - using 
Zmodem protocol
2. Both ways file transfer is good - using Kermit protocol
If I try same thing on non virtual boxes, I don't have  this problem no 
matter what protocol I use.

The problem is that I can't change protocol when using proprietary 
application (for Win only) and this special device on COM port.
http://www2.sma.de/en/solar-technology/products/communication/communication-products-software/sunny-boy-control-plus/overview/index.html 

On the other way, emulated serial port is not acting the same as real 
one. Is this question for xen or qemu developers? Can I try anything else?

I can provide additional info if someone is interested, but I'm not a 
programmer to fix this problem :)

Thank you.

Aleš