Breake long sentence in a \multirow cell whitin a \longtable

Question

I have a \longtable with \multirow cells, as in the picture attached.

Here, if I try to break the line and there isn't enough space at the bottom of the page, the remaining part of the sentence goes outside of the table.

Same issue if I don't force any interruption but the sentence is quite long.

Do you think \pagebreak is the only solution?

Note:

• I know that I'm giving a wrong number of lines to \multirow (i.e. \multirow[t]{5}{=}{item 1\newline pos. A} instead of \multirow[t]{8}{=}{item 1\newline pos. A} but I'm working with thousands of lines which will change in length in a future revision of the doc, so, for me, is easier to count the number of \square (anyway, this seems to not be the cause of my issue).

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{amssymb}
\usepackage{siunitx}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage{longtable}
\usepackage{multirow}
\usepackage{pdflscape}
\renewcommand{\baselinestretch}{1.5}
\begin{document}
\begin{landscape}
\begin{longtable}{|p{4cm}|p{10cm}|p{4cm}|p{4cm}|}
\hline
COMPONENT & CHECKS DESCRIPTION & CHECKED – NOTE & CHECKED – NOTE\\
\hline
\endfirsthead
\hline
COMPONENT & CHECKS DESCRIPTION & CHECKED – NOTE & CHECKED – NOTE\\
\hline
\endhead
\hline
\endfoot
\hline
\endlastfoot
\multirow[t]{5}{=}{item 1\newline pos. A} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\multirow[t]{4}{=}{item 2\newline pos. B} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\multirow[t]{5}{=}{item 3\newline pos. C} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\multirow[t]{3}{=}{item 4\newline pos. D} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\end{longtable}
\end{landscape}
\end{document}

Answer 1

As noted by @leandriis, you should use \\* where you don't want a page break. To be more precise: if you want to keep a 'block' of lines together, use \\* between them, but use \\ at the end to allow a page break there. In your example, the \hlines also allow a page break, so strictly speaking you could use \\* before it too, but I think it is cleaner not to do that.

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{amssymb}
\usepackage{siunitx}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage{longtable}
\usepackage{multirow}
\usepackage{pdflscape}
\renewcommand{\baselinestretch}{1.5}
\begin{document}
\begin{landscape}
\begin{longtable}{|p{4cm}|p{10cm}|p{4cm}|p{4cm}|}
\hline
COMPONENT & CHECKS DESCRIPTION & CHECKED – NOTE & CHECKED – NOTE\\
\hline
\endfirsthead
\hline
COMPONENT & CHECKS DESCRIPTION & CHECKED – NOTE & CHECKED – NOTE\\
\hline
\endhead
\hline
\endfoot
\hline
\endlastfoot
\multirow[t]{5}{=}{item 1\newline pos. A} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\multirow[t]{4}{=}{item 2\newline pos. B} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\multirow[t]{5}{=}{item 3\newline pos. C} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\multirow[t]{3}{=}{item 4\newline pos. D} & check this doing that text text text text text text  & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\*
& check this doing that text text text text text text text text text text text text text & $\square\ldots$ & $\square\ldots$\\
\hline
\end{longtable}
\end{landscape}
\end{document}