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List:       lyx-devel
Subject:    Re: LaTeX3 Error: Backend request inconsistent with engine: using 'pdfmode'
From:       Scott Kostyshak <skostysh () lyx ! org>
Date:       2020-10-31 1:31:28
Message-ID: 20201031013128.gym2eiadhfodov6n () tallinn
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On Sat, Oct 24, 2020 at 12:38:23AM -0400, Scott Kostyshak wrote:
> On Sun, Feb 23, 2020 at 05:49:22PM +0100, Kornel Benko wrote:
> > Am Sun, 23 Feb 2020 16:28:19 -0000 (UTC)
> > schrieb Guenter Milde <milde@users.sf.net>:
> > 
> > > On 2020-02-22, Kornel Benko wrote:
> > > 
> > > > [-- Type: text/plain, Encoding: quoted-printable --]  
> > > 
> > > > Am Sat, 22 Feb 2020 19:04:48 -0000 (UTC)
> > > > schrieb Guenter Milde <milde@users.sf.net>:  
> > > > > On 2020-02-22, Kornel Benko wrote:  
> > > > > > Am Sat, 22 Feb 2020 09:44:21 -0000 (UTC)
> > > > > > schrieb Guenter Milde <milde@users.sf.net>:    
> > > > > > > On 2020-02-20, Scott Kostyshak wrote:    
> > > > > > > > On Mon, Feb 03, 2020 at 04:44:07PM +0100, Kornel Benko wrote:      
> > > > > > > > > Am Mon, 3 Feb 2020 10:42:06 -0500
> > > > > > > > > schrieb Scott Kostyshak <skostysh@lyx.org>:      
> > > > > > > > > > On Mon, Feb 03, 2020 at 04:29:34PM +0100, Kornel Benko wrote:     \
> > > > > > > > > > 
> > > 
> > > > > > > ...    
> > > 
> > > > > > > > I tested on an updated TL. Removing the custom class option dvips \
> > > > > > > > fixes it. However, I'm not sure this is the right thing to do. In the \
> > > > > > > > inverted tests, we have the following:      
> > > 
> > > > > > > > # Comment by Jürgen Spitzmüller
> > > > > > > > # The document requests the dvips graphics driver,
> > > > > > > > # and of course this fails with any other backend.
> > > > > > > > #
> > > > > > > > # The document compiles if one sets the graphics driver to \
> > > > > > > > "Automatic" # and remove the dvips class option. But then, the output \
> > > > > > > > is not correct # (rotation of foils does not work).
> > > > > > > > export/examples/(|fr/)Presentations/Foils_pdf[45]_systemF      
> > > 
> > > > > > > > The output does not seem to change with or without the option for \
> > > > > > > > pdf2 format, but the above comment suggests it does for other \
> > > > > > > > formats.      
> > > 
> > > > > > > Could you please test export to Postscript or PDF (ps2pdf) and check \
> > > > > > > the orientation of rotated pages in the output?    
> > > 
> > > 
> > > > > > No visible differences.
> > > > > > 'diffpdf' finds some, but only some glyphs are there, see attached.    
> > > 
> > > > > If it is/looks right with "auto" now, then it should be save to change from
> > > > > "dvips" to "auto" and remove the clause and comment from "invertedTests".  
> > > 
> > > > > Günter  
> > > 
> > > 
> > > > Looks OK for examples/Presentations/Foils.lyx
> > > > but not for  examples/fr/Presentations/Foils.lyx
> > > > PDF (xetex) (system fonts) OK
> > > > PDF (luatex) (system fonts) OK
> > > > PDF (luatex) (tex fonts) gives following error
> > > > 	...
> > > > 	LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 43.
> > > > 	LaTeX Font Info:    ... okay on input line 43.
> > > > 	LaTeX Info: Redefining \dots on input line 43.
> > > > 	LaTeX Info: Redefining \up on input line 43.
> > > > 	LaTeX Font Info:    Font shape `T1/fcmss/b/n' in size <29.86> not available
> > > > 	(Font)              Font shape `T1/fcmss/bx/n' tried instead on input line \
> > > >                 49.
> > > > 	! error:  (linebreak): invalid list tail, probably missing glue
> > > > 	!  ==> Fatal error occurred, no output PDF file produced!  
> > > 
> > > This looks to me like a different problem. We should invert or ignore the
> > > "LuaTeX with tex fonts" export (Foils is a rather old package and LuaTeX
> > > with 8-bit fonts is not supported by many packages and also seldom used.)
> > > 
> > > How about PDF (pdflatex)?
> > > 
> > > Günter
> > > 
> > This works.
> > BTW, changing the document language from French to English makes the doc \
> > compilable too. I tried to create an mwe. The error comes as soon as
> > 1.) Doc-class FoilTeX
> > 2.) Doc-param empty (no dvips, (with dvips has other errors))
> > 3.) Doc-lang French
> > 4.) tex-fonts
> > 5.) output pdf (luatex)
> > 6.) ANY text in Title
> > 
> > 	Kornel
> 
> What did we decide to do on this? I think we found an improvement
> (remove "auto") for the English doc, but then we started trying to
> figure out the French issue, which is different, and we did not make any
> change in the end.
> 
> Should we remove "dvips" from the custom class option? What exactly
> should the "Graphics driver" combo box be set to? I do not see "auto".
> Should it be set to "Default"?

For now I have specified the default output format to be PDF (ps2pdf). If we remove \
the dvips from the custom class option, we should change the default output format. \
In that case we should also add a note that with XeLaTeX and LuaTeX pages which \
should be rotated are not rotated. I just checked that this still happens on updated \
TL20 (at least with XeLaTeX).

Scott


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