just reading through tcl/mini.tcl by an author not present around here any more

there is some backplot init code which looks suspicious:

emc is paused during backplot init: 
http://git.mah.priv.at/gitweb?p=emc2-dev.git;a=blob;f=tcl/mini.tcl;h=ea615cf754a9fdd75f773fa9db088e91425acd04;hb=9898998e7e9dde11158b02a12d0d6d891ecd882e#l3948

note the tight loop here: 
http://git.mah.priv.at/gitweb?p=emc2-dev.git;a=blob;f=tcl/mini.tcl;h=ea615cf754a9fdd75f773fa9db088e91425acd04;hb=9898998e7e9dde11158b02a12d0d6d891ecd882e#l3953

and the resume here
http://git.mah.priv.at/gitweb?p=emc2-dev.git;a=blob;f=tcl/mini.tcl;h=ea615cf754a9fdd75f773fa9db088e91425acd04;hb=9898998e7e9dde11158b02a12d0d6d891ecd882e#l3996

just a gut feeling. Maybe insert a sleep into the busy wait loop, no idea how 
thats done in tcl

actually its unclear why the pause/resume is in the _redraw_ procedure to start 
with

-m


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