I have a Beaglebone Black with a fresh flash of the 2015-03-01 Debian image 
(bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img) that I cannot scp or 
rsync large files to.

>From my Wheezy 64-bit host VM, I try to scp a 27MB file to the Beaglebone 
via ethernet and the transfer stalls out after <10MB

The debug output from scp shows nothing but "debug2: channel 0: rcvd adjust 
[number]" notices.

Searching the web suggests:

   - MTU mis-matches - no, both sides are 1500.
   - turning off tcp_sack - didn't help
   - Enable compression - didn't help
   - Try rsync - rsync fails, too
   - Try tar over ssh directly - didn't work
   - Upgrading scp/sshd - did "apt-get upgrade scp" and that freshened up a 
   lot but didn't help.

Log snippet is below.  Any suggestions are appreciated.

philmills@VM64:~/DEV/AUC/dist/BEAGLEBONE$ scp -vv -C  ModTests [email protected].
d:/home/debian
Executing: program /usr/bin/ssh host a.b.c.d, user debian, command scp -v -t 
/home/debian
OpenSSH_6.0p1 Debian-4+deb7u2, OpenSSL 1.0.1e 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to a.b.c.d [a.b.c.d] port 22.
debug1: Connection established.
debug1: identity file /home/philmills/.ssh/id_rsa type -1
debug1: identity file /home/philmills/.ssh/id_rsa-cert type -1
debug1: identity file /home/philmills/.ssh/id_dsa type -1
debug1: identity file /home/philmills/.ssh/id_dsa-cert type -1
debug1: identity file /home/philmills/.ssh/id_ecdsa type -1
debug1: identity file /home/philmills/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.0p1 
Debian-4+deb7u2
debug1: match: OpenSSH_6.0p1 Debian-4+deb7u2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u2
debug2: fd 3 setting O_NONBLOCK
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: [email protected],ecdsa-
[email protected],[email protected],
ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa-cert-
[email protected],[email protected],[email protected],
[email protected],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,[email protected]
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,[email protected]
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-
256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-
[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-
256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-
[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],zlib,none
debug2: kex_parse_kexinit: [email protected],zlib,none
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,[email protected]
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,[email protected]
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-
256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-
[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-
256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-
[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
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 [email protected]
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-ctr hmac-md5 [email protected]
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 15:74:3c:e0:05:6a:34:98:4c:f5:f2:ed:3b:1b:2a:
0d
debug1: Host 'a.b.c.d' is known and matches the ECDSA host key.
debug1: Found key in /home/philmills/.ssh/known_hosts:5
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: pmills BEC OpenSSH.ppk (0x7f141e16b290)
debug2: key: /home/philmills/.ssh/id_rsa ((nil))
debug2: key: /home/philmills/.ssh/id_dsa ((nil))
debug2: key: /home/philmills/.ssh/id_ecdsa ((nil))
Debian GNU/Linux 7


BeagleBoard.org Debian Image 2015-03-01


Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian


default username:password is [debian:temppwd]


debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: pmills BEC OpenSSH.ppk
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/philmills/.ssh/id_rsa
debug1: Trying private key: /home/philmills/.ssh/id_dsa
debug1: Trying private key: /home/philmills/.ssh/id_ecdsa
debug2: we did not send a packet, disable method
debug1: Next authentication method: password
[email protected]'s password: 
debug2: we sent a password packet, wait for reply
debug1: Enabling compression at level 6.
debug1: Authentication succeeded (password).
Authenticated to a.b.c.d ([a.b.c.d]:22).
debug2: fd 4 setting O_NONBLOCK
debug2: fd 5 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug2: channel 0: send open
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug2: callback start
debug2: client_session2_setup: id 0
debug2: fd 3 setting TCP_NODELAY
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending command: scp -v -t /home/debian
debug2: channel 0: request exec confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
Sending file modes: C0755 27054794 ModTests
debug2: channel 0: rcvd ext data 33
Sink: C0755 27054794 ModTests
debug2: channel 0: written 33 to efd 6
ModTests                                                         0%    0   
  0.0KB/s   --:-- ETA
debug2: channel 0: rcvd adjust 98331
debug2: channel 0: rcvd adjust 114688
debug2: channel 0: rcvd adjust 114688
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 114688
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 65536
debug2: channel 0: rcvd adjust 65536
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 65536
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 163840
debug2: channel 0: rcvd adjust 163840
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072

*[and so on and so forth until I kill -9 the scp process]*

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