LyX ⇒ LyX xetex output problem with foreign languages

[gatoatigrado]

Dear all,

LyX seems to be inserting some unnecessary codes for foreign characters. When I try to type Cyrillic, the following headers are added:

\usepackage[]{fontenc}
\usepackage[utf8]{inputenc}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% LyX specific LaTeX commands.
\DeclareRobustCommand{\cyrtext}{%
\fontencoding{T2A}\selectfont\def\encodingdefault{T2A}}
\DeclareRobustCommand{\textcyr}[1]{\leavevmode{\cyrtext #1}}
\AtBeginDocument{\DeclareFontEncoding{T2A}{}{}}

These cause XeTeX to fail with the message, "Corrupted NFSS tables" (I believe it is the last command in particular, which causes the error). I have a stylesheet (before I started using LyX) which takes care of all of this in the (I believe) more modern XeTeX way. If there's a way to disable this header generation, that would be much appreciated. I believe the more modern way to achieve this is (for Cyrillic, replacing all statements above):

\usepackage{xunicode,fontspec,xltxtra}
\usepackage[english]{polyglossia}
\setotherlanguages{russian} % set as "other" so English hyphenation active

% other package imports here

\defaultfontfeatures{Mapping=tex-text,Scale=MatchLowercase}
\setromanfont{CMU Serif}
\setsansfont{CMU Sans Serif}
\setmonofont{CMU Typewriter Text}

If anyone knows a way to disable the built-in headers, that would be great! Otherwise, I will probably just postprocess it with a script.

Thanks very much,
Nicholas

[josephwright]

You shouldn't be using inputenc with XeTeX: it is natively UTF-8. Try removing that package, then see what happens.

[gatoatigrado]

I know, these are things LyX inserts. If one selects no input encoding, it inserts all of the LaTeX escape codes. I'll rename the title so it's more clear. Thanks anyway though.

[josephwright]

That sounds like a Lyx bug, really. With UF-8 input, XeTeX should be used "as is". Can you try compiling an example using XeLaTeX directly, rather than via Lyx, and see what happens?

[furykerry]

also has the probem with my Lyx 1.6.5

I workaround the problem by modify Lyx-> Tools-> preference
In the language settings section, uncheck box e.g. use babel etc
In the Output->Latex section,clear the "Tex encoding" field

You can view the tex source to ensure these unwelcome generated tex is removed.

Any better solution?