I have lab'd successfully with linux-microcore-2.10 in Win 7 gns3 but its a differrent issue using my primary OS, Ubuntu 10.04. This is the situation: the qemu host runs perfectly in a topology on its own










Grief sets in when i connect the qemu host to other devices in a full network topology.






Gns3 indicates the host is running in the topology summary but there is no qemu screen to go with it.I can't console into the host and i don't know where to look for debug information. i have tried different qemu versions,from the official repo to compiling my own( version qemu-0.12.5) to even using qemu-0.11.0 and applying the olive patch; basically everything:
My gns3 settings:

qemuwrapper: /home/user/GNS3-0.7.2-src/qemuwrapper/qemuwrapper.py
path to qemu: /usr/bin/qemu
path to qemu-img: /usr/bin/qemu-img
IP/host binding: localhost
qemuwrapper port: 10525
base udp port: 20000
bas console port: 3000
check: enable qemu manager
check: enable qemu manager when importing
external qemuwrapper: localhost:10525
registered external qemuwrappers: localhost:10525

When I test I get:
Qemuwrapper, qemu and qemu-img have successfully started.

In the Qemu host settings I use:
Identifier name: Microcore
Binary image: linux-microcore-2.10.img
Memory: 64(tried 32 and 128 also)
nic: e1000
Qemu options: -no-apci
no check: use KQemo
no check: use KVM


I'm thinking this is a qemu problem as the same also applies to ASA,which btw works perfectly in full topologies under Win7 and previously with Ubuntu 9.04 .This is driving me nuts , just what is the problem?Help please.

Solved.Downgraded qemu to 0.11.0 and now everything is ok.