Re: Maximum number of clients reached in Qt

[Daniel J Sebald]

On 10/14/2012 12:06 AM, Daniel J Sebald wrote:
> It appears there is some limit to the number of Qt windows that the
> GUIDE+O can create:
>
> octave:8> for i = 1:50
> > figure(i)
> > plot(1:50)
> > end
> Maximum number of clients reached
> (<unknown>:17154): Gtk-WARNING **: cannot open display: :0.0
> Could not connect gnuplot_qt "" . Starting a new one
> Maximum number of clients reachedgnuplot_qt: cannot connect to X server
> :0.0
> octave:9>
>
> Is this a concern?

DANGER!  The commands above could mess up your system.  Don't try it 
unless you have everything of value saved.

I think the scenario is as follows:  Octave GUIDE+O opens many plots 
through Qt, which in the case of Linux apparently uses GTK.  GTK reaches 
it's limit of clients, then GUIDE+O can no longer open windows. 
However, GUIDE+O might not behave gracefully but instead gets stuck at 
the command line.  In that case, GTK might be left in a state where it 
thinks the client limit has been reached.  Every system might be 
different on this, but just giving a heads up.

Shortly after running the lines below I couldn't create any more 
instances of gvim without getting the GTK error about clients.  Easy 
workaround, just open more buffers inside gvim.  Here's the problem: if 
the screen saver engages, GTK fails to open a client for the 
password-screen.  All that happens is a flash of the background image 
with each keystroke or mouse movement, leaving little option but to 
cycle the power.

Dan