Yesterday, I was happily using Byobu/tmux (byobu version 5.74, tmux 2.0) with zsh as shell on my machine. Starting from this morning on, every byobu session just hangs after a small time interval and does not accept any input anymore. I start the session and then, for a while (around 0-15 seconds), I see the clock updating in the status bar - and suddenly it stops and I cannot do anything apart from killing tmux.
I already deleted ~/.byobu which did not change anything. Also changing my shell back to bash did not result in any further success... Running byobu as root does not exhibit the problem, switching to screen as backend also fixes it.
When running byobu with strace, the last lines of the log before the crash are
poll([{fd=4, events=POLLIN}, {fd=6, events=POLLIN}], 2, 4294967295) = 1 ([{fd=6, revents=POLLIN}])
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 5
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 7
close(5) = 0
close(7) = 0
recvmsg(6, {msg_name(0)=NULL, msg_iov(1)=[{"\317\0\0\0\20\0\0\0\10\0\0\0\377\377\377\377", 65535}], msg_controllen=0, msg_flags=0}, 0) = 16
poll([{fd=4, events=POLLIN}, {fd=6, events=POLLIN|POLLOUT}], 2, 4294967295) = 1 ([{fd=6, revents=POLLOUT}])
sendmsg(6, {msg_name(0)=NULL, msg_iov(1)=[{"\320\0\0\0\20\0\0\0\10\0\0\0\377\377\377\377", 16}], msg_controllen=0, msg_flags=0}, 0) = 16
poll([{fd=4, events=POLLIN}, {fd=6, events=POLLIN}], 2, 4294967295) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "a", 1, 0, NULL, NULL) = 1
[ last two lines repeated 20 times ]
I can also attach the complete trace if that helps, or provide other debugging data if told how to :)