Public bug reported:

Ubuntu Precise
Versions:
qemu-kvm  1.0+noroms-0ubuntu2     
xvnc4viewer 4.1.1+xorg4.3.0-37ubuntu3


Connecting to a virtual guest via the qemu built in vnc-server crashes 
xvnc4viewer. The image is drawn and then the client crashes.

# xvnc4viewer 192.168.0.202:5900 
VNC Viewer Free Edition 4.1.1 for X - built Sep  7 2011 11:16:25
Copyright (C) 2002-2005 RealVNC Ltd.
See http://www.realvnc.com for information on VNC.

Fri Dec 30 12:00:37 2011
 CConn:       connected to host 192.168.0.202 port 5900
 CConnection: Server supports RFB protocol version 3.8
 CConnection: Using RFB protocol version 3.8
 TXImage:     Using default colormap and visual, TrueColor, depth 16.
 CConn:       Using pixel format depth 6 (8bpp) rgb222
 CConn:       Using ZRLE encoding

Fri Dec 30 12:00:38 2011
 CConn:       Throughput 20000 kbit/s - changing to hextile encoding
 CConn:       Throughput 20000 kbit/s - changing to full colour
 CConn:       Using pixel format depth 16 (16bpp) little-endian rgb565
 CConn:       Using hextile encoding
 main:        ZlibInStream: inflate failed

Using a different Encoding the vncviewer crashes after 1 second with
unknown message type.

# xvnc4viewer -PreferredEncoding raw -Autoselect=0 192.168.0.202:5900

VNC Viewer Free Edition 4.1.1 for X - built Sep  7 2011 11:16:25
Copyright (C) 2002-2005 RealVNC Ltd.
See http://www.realvnc.com for information on VNC.

Fri Dec 30 12:01:52 2011
 CConn:       connected to host 192.168.0.202 port 5900
 CConnection: Server supports RFB protocol version 3.8
 CConnection: Using RFB protocol version 3.8
 TXImage:     Using default colormap and visual, TrueColor, depth 16.
 CConn:       Using pixel format depth 6 (8bpp) rgb222
 CConn:       Using raw encoding
unknown message type 63

Fri Dec 30 12:01:55 2011
 main:        unknown message type

** Affects: vnc4 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/910062

Title:
  vncviewer crashes when connecting to qemu-kvm vnc server

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