Trying to run remote X (not succeeding)

[Walter Dnes]

  OK, I have QEMU-KVM up and running on a 64-bit Gentoo host, running a
32-bit Gentoo guest.  I built the 64-built host without 32-bit support,
only to find afterwards that WINE doesn't run on a 64-bit linux<G>.  And
I can now run a Windows-only antenna-modelling app in WINE in the 32-bit
guest.  The guest has X up and running, but the screen update of X inside
the VM is "somewhat leisurely", to say the least.  First, the lineup...

host
====
- hostname "i3"
- IP address 192.168.123.249

guest
=====
- hostname "g32_00"
- it thinks its IP address is 10.0.2.15

[g32_00][waltdnes][~] /sbin/ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 52:54:00:12:34:56  
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:943 errors:0 dropped:0 overruns:0 frame:0
          TX packets:532 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:71366 (69.6 KiB)  TX bytes:77500 (75.6 KiB)
          Interrupt:11 Base address:0xc000

  What I would like to do is...
- ssh from the host into the guest
- start WINE on the guest, but...
- display the WINE window on the X session in the host

[g32_00][waltdnes][~] /sbin/route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.2.0        0.0.0.0         255.255.255.0   U     0      0        0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         10.0.2.2        0.0.0.0         UG    0      0        0 eth0

  The QEMU-KVM guest is launched with "-redir 5555::22:". To ssh from
the host to the guest, I execute the non-intuitive command...

ssh -p 5555 waltdnes at localhost

>From the guest, I can...

ssh -p 5555 waltdnes-Q0ErXNX1Rub4uyLJKQN6/w at public.gmane.org

scp also works both ways.  I've enabled X forwarding in /etc/sss_config
and /etc/sshd_config on both machines, and restarted sshd on both.  When
I ssh from host to guest, I get...

waltdnes at i3 ~ $ ssh -p 5555 localhost   
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
Last login: Sun Jul 25 18:19:45 2010 from 10.0.2.2

  When I try something simple, like launching xterm from the guest, using
the host's currently-running X session, I get...

[g32_00][waltdnes][~] xterm -display 192.168.123.249
xterm Xt error: Can't open display: 192.168.123.249

* I've checked the logs, and it's not an iptables problem.
* I've gotten rid of "-nolisten tcp" in the X startup script on the host.
* I've bypassed ssh altogether, and from the QEMU-KVM window typed...

[g32_00][waltdnes][~] xterm -display 192.168.123.249

No luck.  Any ideas?

-- 
Walter Dnes <waltdnes-SLHPyeZ9y/tg9hUCZPvPmw at public.gmane.org>
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