hk@d600:~> ssh -Y -vvv x220 firefox
OpenSSH_6.0p1, OpenSSL 1.0.1e 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to x220 [192.168.178.23] port 22.
debug1: Connection established.
debug1: identity file /home/hk/.ssh/id_rsa type -1
debug1: identity file /home/hk/.ssh/id_rsa-cert type -1
debug1: identity file /home/hk/.ssh/id_dsa type -1
debug1: identity file /home/hk/.ssh/id_dsa-cert type -1
debug1: identity file /home/hk/.ssh/id_ecdsa type -1
debug1: identity file /home/hk/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 1.99, remote software version OpenSSH_6.0
debug1: match: OpenSSH_6.0 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.0
debug2: fd 3 setting O_NONBLOCK
debug3: load_hostkeys: loading entries for host "x220" from file "/home/hk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/hk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
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: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-rsa,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-cbc@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-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@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: 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,ssh-dss,ecdsa-sha2-nistp256
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-cbc@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-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@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: 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: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 8e:2e:bc:3d:57:72:e6:fd:39:d3:66:2a:ff:21:ae:69
debug3: load_hostkeys: loading entries for host "x220" from file "/home/hk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/hk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "192.168.178.23" from file "/home/hk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/hk/.ssh/known_hosts:2
debug3: load_hostkeys: loaded 1 keys
debug1: Host 'x220' is known and matches the ECDSA host key.
debug1: Found key in /home/hk/.ssh/known_hosts:1
debug1: ssh_ecdsa_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/hk/.ssh/id_rsa ((nil))
debug2: key: /home/hk/.ssh/id_dsa ((nil))
debug2: key: /home/hk/.ssh/id_ecdsa ((nil))
debug1: Authentications that can continue: publickey,keyboard-interactive
debug3: start over, passed a different list publickey,keyboard-interactive
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/hk/.ssh/id_rsa
debug3: no such identity: /home/hk/.ssh/id_rsa
debug1: Trying private key: /home/hk/.ssh/id_dsa
debug3: no such identity: /home/hk/.ssh/id_dsa
debug1: Trying private key: /home/hk/.ssh/id_ecdsa
debug3: no such identity: /home/hk/.ssh/id_ecdsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 1
Password: 
debug3: packet_send2: adding 32 (len 27 padlen 5 extra_pad 64)
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 0
debug3: packet_send2: adding 48 (len 10 padlen 6 extra_pad 64)
debug1: Authentication succeeded (keyboard-interactive).
Authenticated to x220 ([192.168.178.23]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug2: callback start
debug2: x11_get_proto: /usr/bin/xauth  list :0.0 2>/dev/null
debug1: Requesting X11 forwarding with authentication spoofing.
debug2: channel 0: request x11-req confirm 1
debug2: client_session2_setup: id 0
debug2: fd 3 setting TCP_NODELAY
debug3: packet_set_tos: set IP_TOS 0x08
debug1: Sending environment.
debug3: Ignored env XDG_VTNR
debug3: Ignored env LESSKEY
debug3: Ignored env MANPATH
debug3: Ignored env NNTPSERVER
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env HOSTNAME
debug3: Ignored env XKEYSYMDB
debug3: Ignored env GPG_AGENT_INFO
debug3: Ignored env GLADE_PIXMAP_PATH
debug3: Ignored env TERM
debug3: Ignored env HOST
debug3: Ignored env XDG_MENU_PREFIX
debug3: Ignored env SHELL
debug3: Ignored env PROFILEREAD
debug3: Ignored env XDG_SESSION_COOKIE
debug3: Ignored env HISTSIZE
debug3: Ignored env TMPDIR
debug3: Ignored env WINDOWID
debug3: Ignored env MORE
debug3: Ignored env GNOME_KEYRING_CONTROL
debug3: Ignored env XSESSION_IS_UP
debug3: Ignored env GTK_MODULES
debug3: Ignored env USER
debug3: Ignored env JRE_HOME
debug3: Ignored env LS_COLORS
debug3: Ignored env XNLSPATH
debug3: Ignored env XDG_SESSION_PATH
debug3: Ignored env GLADE_MODULE_PATH
debug3: Ignored env XDG_SEAT_PATH
debug3: Ignored env HOSTTYPE
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env FROM_HEADER
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env COLUMNS
debug3: Ignored env PAGER
debug3: Ignored env CSHEDIT
debug3: Ignored env XDG_CONFIG_DIRS
debug3: Ignored env MINICOM
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env MAIL
debug3: Ignored env PATH
debug3: Ignored env CPU
debug3: Ignored env QT_IM_MODULE
debug3: Ignored env JAVA_BINDIR
debug3: Ignored env INPUTRC
debug3: Ignored env PWD
debug3: Ignored env XMODIFIERS
debug3: Ignored env JAVA_HOME
debug3: Ignored env GNOME_KEYRING_PID
debug1: Sending env LANG = de_DE.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env PYTHONSTARTUP
debug3: Ignored env GDMFLEXISERVER
debug3: Ignored env LINES
debug3: Ignored env GDMSESSION
debug3: Ignored env GPG_TTY
debug3: Ignored env SHLVL
debug3: Ignored env HOME
debug3: Ignored env QT_SYSTEM_DIR
debug3: Ignored env XDG_SEAT
debug3: Ignored env LESS_ADVANCED_PREPROCESSOR
debug3: Ignored env OSTYPE
debug3: Ignored env LS_OPTIONS
debug3: Ignored env XCURSOR_THEME
debug3: Ignored env WINDOWMANAGER
debug3: Ignored env G_FILENAME_ENCODING
debug3: Ignored env LESS
debug3: Ignored env LOGNAME
debug3: Ignored env MACHTYPE
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env LESSOPEN
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env DISPLAY
debug3: Ignored env GLADE_CATALOG_PATH
debug3: Ignored env XAUTHLOCALHOSTNAME
debug3: Ignored env GTK_IM_MODULE
debug3: Ignored env LESSCLOSE
debug3: Ignored env G_BROKEN_FILENAMES
debug3: Ignored env QT_IM_SWITCHER
debug3: Ignored env JAVA_ROOT
debug3: Ignored env XAUTHORITY
debug3: Ignored env COLORTERM
debug3: Ignored env _
debug1: Sending command: firefox
debug2: channel 0: request exec confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: X11 forwarding request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
debug1: client_input_channel_open: ctype x11 rchan 3 win 65536 max 16384
debug1: client_request_x11: request from ::1 40742
debug2: fd 7 setting O_NONBLOCK
debug3: fd 7 is O_NONBLOCK
debug1: channel 1: new [x11]
debug1: confirm x11
debug1: client_input_channel_open: ctype x11 rchan 4 win 65536 max 16384
debug1: client_request_x11: request from ::1 40743
debug2: fd 8 setting O_NONBLOCK
debug3: fd 8 is O_NONBLOCK
debug1: channel 2: new [x11]
debug1: confirm x11
debug2: channel 1: rcvd adjust 42836
debug2: channel 1: rcvd adjust 37868
debug2: channel 1: rcvd eof
debug2: channel 1: output open -> drain
debug2: channel 1: obuf empty
debug2: channel 1: close_write
debug2: channel 1: output drain -> closed
debug1: channel 1: FORCE input drain
debug2: channel 1: ibuf empty
debug2: channel 1: send eof
debug2: channel 1: input drain -> closed
debug2: channel 1: send close
debug3: channel 1: will not send data after close
debug3: channel 1: will not send data after close
debug3: channel 1: will not send data after close
debug3: channel 1: will not send data after close
debug3: channel 1: will not send data after close
debug2: channel 1: rcvd close
debug3: channel 1: will not send data after close
debug2: channel 1: is dead
debug2: channel 1: garbage collecting
debug1: channel 1: free: x11, nchannels 3
debug3: channel 1: status: The following connections are open:
  #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1)
  #1 x11 (t4 r3 i3/0 o3/0 fd 7/7 cc -1)
  #2 x11 (t4 r4 i0/0 o0/0 fd 8/8 cc -1)

debug2: channel 2: rcvd eof
debug2: channel 2: output open -> drain
debug2: channel 2: obuf empty
debug2: channel 2: close_write
debug2: channel 2: output drain -> closed
debug1: channel 2: FORCE input drain
debug2: channel 2: ibuf empty
debug2: channel 2: send eof
debug2: channel 2: input drain -> closed
debug2: channel 2: send close
debug1: client_input_channel_open: ctype x11 rchan 3 win 65536 max 16384
debug1: client_request_x11: request from ::1 40744
debug2: fd 7 setting O_NONBLOCK
debug3: fd 7 is O_NONBLOCK
debug1: channel 1: new [x11]
debug1: confirm x11
debug3: channel 2: will not send data after close
debug3: channel 2: will not send data after close
debug2: channel 2: rcvd close
debug3: channel 2: will not send data after close
debug2: channel 2: is dead
debug2: channel 2: garbage collecting
debug1: channel 2: free: x11, nchannels 3
debug3: channel 2: status: The following connections are open:
  #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1)
  #1 x11 (t7 r3 i0/0 o0/0 fd 7/7 cc -1)
  #2 x11 (t4 r4 i3/0 o3/0 fd 8/8 cc -1)

debug1: client_input_channel_open: ctype x11 rchan 4 win 65536 max 16384
debug1: client_request_x11: request from ::1 40745
debug2: fd 8 setting O_NONBLOCK
debug3: fd 8 is O_NONBLOCK
debug1: channel 2: new [x11]
debug1: confirm x11
debug1: client_input_channel_open: ctype x11 rchan 5 win 65536 max 16384
debug1: client_request_x11: request from ::1 40746
debug2: fd 9 setting O_NONBLOCK
debug3: fd 9 is O_NONBLOCK
debug1: channel 3: new [x11]
debug1: confirm x11
debug1: client_input_channel_open: ctype x11 rchan 6 win 65536 max 16384
debug1: client_request_x11: request from ::1 40747
debug2: fd 10 setting O_NONBLOCK
debug3: fd 10 is O_NONBLOCK
debug1: channel 4: new [x11]
debug1: confirm x11
debug2: channel 4: rcvd eof
debug2: channel 4: output open -> drain
debug2: channel 4: obuf empty
debug2: channel 4: close_write
debug2: channel 4: output drain -> closed
debug1: channel 4: FORCE input drain
debug2: channel 4: ibuf empty
debug2: channel 4: send eof
debug2: channel 4: input drain -> closed
debug2: channel 4: send close
debug3: channel 4: will not send data after close
debug2: channel 4: rcvd close
debug3: channel 4: will not send data after close
debug2: channel 4: is dead
debug2: channel 4: garbage collecting
debug1: channel 4: free: x11, nchannels 5
debug3: channel 4: status: The following connections are open:
  #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1)
  #1 x11 (t4 r3 i0/0 o0/0 fd 7/7 cc -1)
  #2 x11 (t4 r4 i0/0 o0/0 fd 8/8 cc -1)
  #3 x11 (t4 r5 i0/0 o0/0 fd 9/9 cc -1)
  #4 x11 (t4 r6 i3/0 o3/0 fd 10/10 cc -1)

debug2: channel 1: window 2038260 sent adjust 58892
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2043992 sent adjust 53160
debug2: channel 1: window 2031616 sent adjust 32768
debug2: channel 1: window 1881592 sent adjust 161920
debug2: channel 1: window 2043512 sent adjust 53640
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 16384
debug2: channel 1: window 2028560 sent adjust 68592
debug2: channel 1: window 2031616 sent adjust 65536
debug2: channel 1: window 2031616 sent adjust 32768
debug2: channel 1: window 2032352 sent adjust 64800
debug2: channel 1: window 2035260 sent adjust 61892
debug2: channel 1: rcvd adjust 33108
debug2: channel 1: window 2046796 sent adjust 50356
debug2: channel 1: window 2047512 sent adjust 49640
debug2: channel 1: window 2046620 sent adjust 50532
debug2: channel 1: window 2043668 sent adjust 53484
debug2: channel 1: window 2041264 sent adjust 55888
debug2: channel 1: window 2043616 sent adjust 53536
debug2: channel 1: rcvd adjust 46224
debug2: channel 1: rcvd adjust 49152
debug2: channel 1: rcvd adjust 49152
debug2: channel 1: rcvd adjust 49152
debug2: channel 1: rcvd adjust 49152
debug2: channel 1: rcvd adjust 49152
debug2: channel 1: rcvd adjust 47136
debug2: channel 1: rcvd adjust 39936
debug2: channel 1: window 2039356 sent adjust 57796
Received disconnect from 192.168.178.23: 2: Packet corrupt