Re: 2.6.35.11 + qemu-kvm 0.14.0 + Windows XP RDP access = unstable

[Avi Kivity <avi@redhat.com>]

On 03/08/2011 08:43 AM, Thomas Løcke wrote:
> Hey all,
>
> I have 9 Windows XP guests running on a KVM host. The host is
> Slackware 13.1 x86_64 with kernel 2.6.35.11.
>
> All the guests are being accessed using the built-in RDP server in
> Windows XP. This worked perfectly with qemu-kvm 0.13.0, but with
> 0.14.0 the connection is dropped every 5-10 minutes.
>
> This is the command used to start the guests:
>
> /opt/qemu-0.13.0/bin/qemu-system-x86_64 -name fdacs1sa1_15,
> process=fdacs1sa1_15 \
>      -pidfile /var/run/kvm/15.pid \
>      -drive file=/storage_slow_one/fd_acs2_sa2.raw,snapshot=off,if=virtio,media=disk,cache=none,format=raw,boot=on
> \
>      -monitor unix:/var/run/kvm/15.monitor,server,nowait \
>      -cpu qemu64 \
>      -smp 1 \
>      -m 512 \
>      -k da \
>      -vnc :15 \
>      -rtc base=localtime,clock=host \
>      -tdf \
>      -net nic,macaddr=de:ad:be:ef:00:15,model=virtio \
>      -net tap,ifname=tap_15,script=no,downscript=no \
>      -runas kvm \
>      -daemonize \
>      -usbdevice tablet
>
> The virtio drivers used are virtio-win-1.1.16.
>
> Access via the qemu-kvm VNC interface does not experience these
> connection drops. There are no visible errors in the Windows XP
> guests.
>
> Now, since I don't have any issues with qemu-kvm 0.13.0, it is not a
> problem for me to go back to using this version instead of the new
> 0.14.0.
>
> So:
>      2.6.35.11 + 0.13.0 = Flawless operation. It just hums along.
>      2.6.35.11 + 0.14.0 = The connection to the internal Windows XP RDP
> server breaks every 5-10 minutes.
>
> Anybody else who've experienced something similar?

You might try logging the connection with wireshark (start on the, 
perhaps later also in the guest) to see what's the cause.  If you run it 
on both guest and host, you can see if packets are lost or corrupted.

-- 
error compiling committee.c: too many arguments to function