Issues with page size using memoir

Question

I am using LaTeX to typeset my wife's book and was having no problems until recently. I have the file set up to produce a 6x9 page size and was working fine. When I upgraded my computer to the latest version of Ubuntu (17.04) the pages are now coming out as 8.5x11, but only if \include{graphicx} is used, and only with the memoir document class. It is also happening on my windows box with Miktex, both of which were working fine until the upgrade.

\documentclass{memoir}
\usepackage[paperwidth=6in,paperheight=9in]{geometry}
\usepackage{lipsum}

\begin{document}
\lipsum[1-6]
\end{document}

This code works fine, producing a pdf with a page size of 6x9, but when I add \usepackage{graphicx}:

\documentclass{memoir}
\usepackage[paperwidth=6in,paperheight=9in]{geometry}
\usepackage{graphicx}
\usepackage{lipsum}
\begin{document}
\lipsum[1-6]
\end{document}

it goes to 8.5 x 11. I have tried adding \pdfpagewidth=6in \pdfpageheight=9in and it has no effect. Has there been a change to the memoir class or the graphicx? Is there an alternative to graphicx? Or a different way to set the page size?

Answer 1

The problem is that pdftex.def (for many years actually) detects memoir's \stockwidth length and uses that in preference to \paperwidth if it is set.

If you used memoir facilities this would be set up but a quick fix would be

\documentclass{memoir}
\usepackage[paperwidth=6in,paperheight=9in]{geometry}
\usepackage{graphicx}

\stockwidth\paperwidth
\stockheight\paperheight
\usepackage{lipsum}
\begin{document}
\lipsum[1-6]
\end{document}

Answer 2

There is no need for geometry in this case, not even manually setting the sizes. Just issue the memoir class option ebook this sets the stock and such sequentially the paper size to 6x9 in.

Then if you need to change the margins use for example

\setlrmarginsandblock{left} {right} {ratio} 
\setulmarginsandblock{top} {bottom} {ratio} 
\checkandfixthelayout 

Note that in the three arg combos exactly one arg has to be *