[X2go-dev] arbitrary no-connection issues with »Warning: No data received from remote proxy within 30 seconds.«

Tue Oct 6 23:49:04 CEST 2009

Dear X2go developers and users,

since some time I sometimes cannot connect with my client to the server.

The system the server is running on gets also used as a desktop machine.
I think the issue is surfaces when a second user logs into the system
using for example GNOME’s switch-user-applet.

I do not know when this problem started. I am using Debian unstable/sid.
A big change was the upgrade to GNOME 2.28 and the X.org server (1:7.4
+4).

When the problem occurs `nxproxy -S`

        $ nxproxy -S

        NXPROXY - Version 3.3.0

        Copyright (C) 2001, 2007 NoMachine.
        See http://www.nomachine.com/ for more information.

        Info: Proxy running in client mode with pid '4871'.
        Session: Starting session at 'Tue Oct  6 23:40:59 2009'.
        Info: Waiting for connection from any host on port '4008'.
        Info: Aborting the procedure due to signal '15'.
        Session: Session terminated at 'Tue Oct  6 23:41:24 2009'.

I do not where know where I can get useful server logs for you. This
gets printed to the terminal running x2goclient_gtk from the command
line.

        $ x2goclient_gtk &
        [1] 8066
        (x2goclient_gtk:8066): Gdk-CRITICAL **: gdk_drawable_copy_to_image: assertion `src_x >= 0' failed
        x2gostartagent fullscreen lan 16m-jpeg-9 unix-kde-depth_32 de pc105/de 1 D GNOME
        50
        8d1ccc606b790063e50135da76eaaecc
        18829
        x-50-1254863708_stDGNOME_dp32
        30001
        30002
        30003

        OpenSSH_5.1p1 Debian-8, OpenSSL 0.9.8k 25 Mar 2009
        debug1: Reading configuration data /etc/ssh/ssh_config
        debug1: Applying options for *
        debug1: Connecting to 192.168.178.25 [10.10.10.10] port 22.
        debug1: Connection established.
        debug1: identity file /home/paul/.ssh/identity type -1
        debug1: identity file /home/paul/.ssh/id_rsa type 1
        debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-8192
        debug1: Checking blacklist file /etc/ssh/blacklist.RSA-8192
        debug1: identity file /home/x/.ssh/id_dsa type -1
        debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-8
        debug1: match: OpenSSH_5.1p1 Debian-8 pat OpenSSH*
        debug1: Enabling compatibility mode for protocol 2.0
        debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-8
        debug1: SSH2_MSG_KEXINIT sent
        debug1: SSH2_MSG_KEXINIT received
        debug1: kex: server->client blowfish-cbc hmac-md5 none
        debug1: kex: client->server blowfish-cbc hmac-md5 none
        debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
        debug1:
        OpenSSH_5.1p1 Debian-8, OpenSSL 0.9.8k 25 Mar 2009
        debug1: Reading configuration data /etc/ssh/ssh_config
        debug1: Applying options for *
        debug1: Connecting to 10.10.10.10 [10.10.10.10] port 22.
        debug1: Connection established.
        debug1: identity file /home/x/.ssh/identity type -1
        debug1: identity file /home/x/.ssh/id_rsa type 1
        debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-8192
        debug1: Checking blacklist file /etc/ssh/blacklist.RSA-8192
        debug1: identity file /home/x/.ssh/id_dsa type -1
        debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-8
        debug1: match: OpenSSH_5.1p1 Debian-8 pat OpenSSH*
        debug1: Enabling compatibility mode for protocol 2.0
        debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-8
        debug1: SSH2_MSG_KEXINIT sent
        debug1: SSH2_MSG_KEXINIT received
        debug1: kex: server->client blowfish-cbc hmac-md5 none
        debug1: kex: client->server blowfish-cbc hmac-md5 none
        debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
        debug1:
        expecting SSH2_MSG_KEX_DH_GEX_GROUP
        debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
        debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
        debug1: Host '10.10.10.10' is known and matches the RSA host key.
        debug1: Found key in /home/x/.ssh/known_hosts:17
        debug1: ssh_rsa_verify: signature correct
        debug1: SSH2_MSG_NEWKEYS sent
        debug1: expecting SSH2_MSG_NEWKEYS
        debug1: SSH2_MSG_NEWKEYS received
        debug1: SSH2_MSG_SERVICE_REQUEST sent
        debug1: SSH2_MSG_SERVICE_ACCEPT received

        expecting SSH2_MSG_KEX_DH_GEX_GROUP
        debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
        debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
        debug1: Host '10.10.10.10' is known and matches the RSA host key.
        debug1: Found key in /home/x/.ssh/known_hosts:12317
        debug1: ssh_rsa_verify: signature correct
        debug1: SSH2_MSG_NEWKEYS sent
        debug1: expecting SSH2_MSG_NEWKEYS
        debug1: SSH2_MSG_NEWKEYS received
        debug1: SSH2_MSG_SERVICE_REQUEST sent
        debug1: SSH2_MSG_SERVICE_ACCEPT received

        debug1: Authentications that can continue: publickey,password
        debug1: Next authentication method: publickey
        debug1: Trying private key: /home/x/.ssh/identity
        debug1: Offering public key: /home/x/.ssh/id_rsa
        debug1: Authentications that can continue: publickey,password
        debug1: Trying private key: /home/x/.ssh/id_dsa
        debug1: Next authentication method: password
        debug1: read_passphrase: can't open /dev/tty: No such device or address
        debug1: permanently_drop_suid: 1000

        debug1: Authentications that can continue: publickey,password
        debug1: Next authentication method: publickey
        debug1: Trying private key: /home/x/.ssh/identity
        debug1: Offering public key: /home/x/.ssh/id_rsa
        debug1: Authentications that can continue: publickey,password
        debug1: Trying private key: /home/x/.ssh/id_dsa
        debug1: Next authentication method: password
        debug1: read_passphrase: can't open /dev/tty: No such device or address
        debug1: permanently_drop_suid: 1000

        debug1: Authentication succeeded (password).
        debug1: Local connections to LOCALHOST:30001 forwarded to remote address localhost:30001
        debug1: Local forwarding listening on ::1 port 30001.
        debug1: channel 0: new [port listener]
        debug1: Local forwarding listening on 127.0.0.1 port 30001.
        debug1: channel 1: new [port listener]
        debug1: Requesting no-more-sessions at openssh.com
        debug1: Entering interactive session.

        debug1: Connection to port 30001 forwarding to localhost port 30001 requested.
        debug1: channel 2: new [direct-tcpip]

        NXPROXY - Version 3.3.0

        Copyright (C) 2001, 2007 NoMachine.
        See http://www.nomachine.com/ for more information.

        Info: Proxy running in client mode with pid '8077'.
        Session: Starting session at 'Tue Oct  6 23:15:14 2009'.
        Info: Connecting to remote host 'localhost:30001'.
        Info: Connection to remote proxy 'localhost:30001' established.
        Info: Connection with remote proxy completed.
        Warning: Unrecognized session type 'unix-kde-depth_32'. Assuming agent session.
        Info: Using LAN link parameters 1536/24/1/0.
        Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_32'.
        Info: Not using NX delta compression.
        Info: Not using ZLIB data compression.
        Info: Not using ZLIB stream compression.
        Info: Not using a persistent cache.
        Info: Forwarding X11 connections to display ':0'.
        Session: Session started at 'Tue Oct  6 23:15:15 2009'.

        debug1: Authentication succeeded (password).
        debug1: Remote connections from LOCALHOST:30002 forwarded to local address localhost:4713
        debug1: Requesting no-more-sessions at openssh.com
        debug1: Entering interactive session.

        mkdir: kann Verzeichnis „/home/x/.pulse“ nicht anlegen: Die Datei existiert bereits

        debug1: remote forward success for: listen 30002, connect localhost:4713
        debug1: All remote forwarding requests processed

        Warning: No data received from remote proxy within 30 seconds.

        Session: Terminating session at 'Tue Oct  6 23:15:45 2009'.

        Info: Waiting the cleanup timeout to complete.

        debug1: channel 2: free: direct-tcpip: listening port 30001 for localhost port 30001, connect from 127.0.0.1 port 44416, nchannels 3

        Session: Session terminated at 'Tue Oct  6 23:16:09 2009'.

        debug1: channel 0: free: port listener, nchannels 2
        debug1: channel 1: free: port listener, nchannels 1
        Transferred: sent 2480, received 2128 bytes, in 55.2 seconds
        Bytes per second: sent 44.9, received 38.5
        debug1: Exit status 0

        Transferred: sent 2104, received 1800 bytes, in 55.0 seconds
        Bytes per second: sent 38.2, received 32.7
        debug1: Exit status 0

        cat: /home/x/.x2go/C-x-50-1254863708_stDGNOME_dp32/cmdoutput: Datei oder Verzeichnis nicht gefunden

        /usr/bin/x2goresume-session: Zeile 75: kill: (18829) - Kein passender Prozess gefunden

Thanks,

Paul
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