Bug#771805: most often triggered by

[Yaroslav Halchenko]

switching to another virtual desktop

e.g. I select something with mouse in one, switch to another (on
keyboard shortcuts) and unable to paste -- mouse is frozen.

actually can reproduce almost always if I  e.g.

switch to another desktop # Super 1
select some text with mouse
switch back # Super 2
click to select window mouse is under (but without moving mouse)

FREEZE

-- 
Yaroslav O. Halchenko, Ph.D.
http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
Research Scientist,            Psychological and Brain Sciences Dept.
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
WWW:   http://www.linkedin.com/in/yarik