bug#17172: Timeouts when pasting

[David A. Thompson]

I'm experiencing a similar delay with 25.0.50.1. GUI-GET-SELECTION just
hangs out for a while and then times out.

Cut/paste works fine between other X apps (e.g., claws-mail and
firefox).

Two observations: 

1. running (shell-command-to-string "xclip -o") hangs
emacs until I kill xclip. Running xclip -o in a shell puts the
clipboard content on stdout without any issues...

2. this behavior doesn't occur consistently -- emacs will behave for a
while and then, at some point, yanking becomes painful


Other details:

Linux d630 3.12-1-686-pae #1 SMP Debian 3.12.9-1
(2014-02-01) i686 GNU/Linux

window manager: i3


- Alan