I am seeing the same symptoms... About one in 10 logins get stuck at the 'sending variable' part
Though I continue my session using ctrl-z (probably sending something to the background by doing so)
byobu version 5.87 Screen version 4.03.01 (GNU) 28-Jun-15
3.16.0-4-686-pae #1 SMP Debian 3.16.7-ckt9-3 (2015-04-23) i686 GNU/Linux
I am seeing the same symptoms... About one in 10 logins get stuck at the 'sending variable' part
Though I continue my session using ctrl-z (probably sending something to the background by doing so)
byobu version 5.87
Screen version 4.03.01 (GNU) 28-Jun-15
3.16.0-4-686-pae #1 SMP Debian 3.16.7-ckt9-3 (2015-04-23) i686 GNU/Linux