On Mon, May 11, 2009 at 05:31:22PM -0700, Alan Irwin wrote:
> On 2009-05-11 22:35+0100 Andrew Ross wrote:
> 
> > I've tried and the same thing occurs with the epsqt driver. In both cases 
> > gdb
> > shows that the example is hanging on a connect system call in the cups
> > library. I'm now wondering if the problem is actually to do with cups
> > configuration in my case rather than qt? Perhaps others can confirm / deny
> > this?
> 
> That's a really interesting speculation that makes a certain amount of sense
> since there is a strong printing component to the EPS and PDF formats.
> However, I am not sure this would be an issue for the downloadable Qt SDK.
> For that case, they probably provide their own CUP libraries since the Linux
> ones come in all sorts of versions/configurations which would be hard
> for trolltech to anticipate.
> 
> Also, this may not be an issue for Debian.  When I first tried qt, I just
> used the Qt-4.4.3 Debian packages, and as best I can remember I tried pdfqt
> a couple of times without any noticeable pdfqt speed issues. OTOH, I may not
> be remembering right, and in any case most of my pdfqt testing has been
> after I moved to the downloadable Qt4 SDK you can get from trolltech.
> 
> Did you use a Ubuntu package for Qt-4.5.0 or the downloadable SDK (which is
> now Qt-4.5.1, but it was 4.5.0 not that long ago).
> 
> If you haven't yet tried that downloadable SDK, I suggest you do so to
> see if this (Qt4?/cups?) problem persists.

I've tried on another Ubuntu system. Same versions of all the software, 
but 64-bit. This system works fine with near instantaneous running of 
the examples. Printers and so forth are different between the two 
systems, so now I just need to work out exactly what differences are 
causing the problem. But anyway it doesn't look like an intrinsic 
problem with Qt libs. 

Andrew

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