Sorry about the slow reply.
The OS of the target machines was CENTOS 5.5 and 5.4 [root@MQWKS4 ~]# ssh -V OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 $ ssh -vvv -X feilh@mqwks4 OpenSSH_5.8p1, OpenSSL 0.9.8r 8 Feb 2011 debug2: ssh_connect: needpriv 0 debug1: Connecting to mqwks4 [10.16.72.11] port 22. debug1: Connection established. debug1: identity file /home/hf21548/.ssh/id_rsa type -1 debug1: identity file /home/hf21548/.ssh/id_rsa-cert type -1 debug1: identity file /home/hf21548/.ssh/id_dsa type -1 debug1: identity file /home/hf21548/.ssh/id_dsa-cert type -1 debug1: identity file /home/hf21548/.ssh/id_ecdsa type -1 debug1: identity file /home/hf21548/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3 debug1: match: OpenSSH_4.3 pat OpenSSH_4* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "mqwks4" from file "/home/hf21548/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/hf21548/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-...@openssh.com,ssh-rsa-cert-...@openssh.com,ssh-rsa debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa-cert-...@openssh.com,ssh-rsa-cert-...@openssh.com,ssh-rsa,ecdsa-sha2-nistp256-cert-...@openssh.com,ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521-cert-...@openssh.com,ssh-dss-cert-...@openssh.com,ssh-dss-cert-...@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,z...@openssh.com,zlib debug2: kex_parse_kexinit: none,z...@openssh.com,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-...@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-...@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,z...@openssh.com debug2: kex_parse_kexinit: none,z...@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug2: dh_gen_key: priv key bits set: 132/256 debug2: bits set: 505/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: RSA 78:f3:28:01:c8:0d:47:46:05:db:95:d3:8a:f0:b0:c5 debug3: load_hostkeys: loading entries for host "mqwks4" from file "/home/hf21548/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/hf21548/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug3: load_hostkeys: loading entries for host "10.16.72.11" from file "/home/hf21548/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/hf21548/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug1: Host 'mqwks4' is known and matches the RSA host key. debug1: Found key in /home/hf21548/.ssh/known_hosts:1 debug2: bits set: 523/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/hf21548/.ssh/id_rsa (0x0) debug2: key: /home/hf21548/.ssh/id_dsa (0x0) debug2: key: /home/hf21548/.ssh/id_ecdsa (0x0) debug1: Authentications that can continue: publickey,gssapi-with-mic,password debug3: start over, passed a different list publickey,gssapi-with-mic,password debug3: preferred publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/hf21548/.ssh/id_rsa debug3: no such identity: /home/hf21548/.ssh/id_rsa debug1: Trying private key: /home/hf21548/.ssh/id_dsa debug3: no such identity: /home/hf21548/.ssh/id_dsa debug1: Trying private key: /home/hf21548/.ssh/id_ecdsa debug3: no such identity: /home/hf21548/.ssh/id_ecdsa debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: ,password debug3: authmethod_is_enabled password debug1: Next authentication method: password feilh@mqwks4's password: debug3: packet_send2: adding 64 (len 59 padlen 5 extra_pad 64) debug2: we sent a password packet, wait for reply debug1: Authentication succeeded (password). Authenticated to mqwks4 ([10.16.72.11]:22). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Entering interactive session. debug2: callback start debug2: x11_get_proto: /usr/bin/xauth -f /tmp/ssh-IFVizRlT6060/xauthfile generate :0.0 MIT-MAGIC-COOKIE-1 untrusted timeout 1200 2>/dev/null Warning: untrusted X11 forwarding setup failed: xauth key data not generated Warning: No xauth data; using fake authentication data for X11 forwarding. debug1: Requesting X11 forwarding with authentication spoofing. debug2: channel 0: request x11-req confirm 0 debug2: client_session2_setup: id 0 debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x10 debug2: channel 0: request pty-req confirm 1 debug2: channel 0: request shell confirm 1 debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: channel_input_status_confirm: type 99 id 0 debug2: PTY allocation request accepted on channel 0 debug2: channel 0: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 0 debug2: shell request accepted on channel 0 Last login: Thu Jul 28 12:18:59 2011 from abg743.aero.org MQWKS4:~> Sent: Monday, August 1, 2011 2:43 PM Subject: Re: X server shutdown or killed/destroyed On 29/07/2011 15:27, Howard Feil wrote: > > Thanks for the reply. > > So far ssh -Y seems to be doing the trick. Good. I'd like to know a bit more about why this is happening, though, so if you could share the OS and sshd version which is running on the machine you are sshd-ing to, and the output when you connect using ssh -vvv -X, that would be interesting. > On 26/07/2011 14:20, Howard Feil wrote: >> I have installed cygwin on several windows XP 32bit machines. To do the >> install I used the defaults and then installed all of X11 and >> Networks. After a little while > > about 20 minutes? > >> when opening a new windows, I get the >> error: >> >> >> The application 'gedit' lost its connection to the display localhost:11.0; >> most likely the X server was shut down or you killed/destroyed >> the application. >> >> It doesn't matter what I do next, nothing simple makes the x-server come >> back alive. >> >> This >> is happening on multiple machines. For some reasons I have other >> machines that never have a problem. These machines may have older >> installations. >> >> >> Any advice is appreciated. > > Use ssh -Y > > [1] http://cygwin.com/ml/cygwin/2011-05/msg00394.html -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/