Hi, On Mon, 6 Dec 2021 14:05:48 +0000, Matthew Wilcox wrote: > I don't know what changed to cause this (could be something in Debian, > could be something in the kernel). > > On August 16th, I generated a 'make htmldocs' that looks fine. > Yesterday, I generated one and it's missing these two crucial lines > (there are many other changes, but restoring these two lines to any > given file makes it look fine): > > <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" /> > <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> > > I can't find any commits that look relevant. I have sphinx 4.3.1-1 > installed. I also tried with 4.2.0-5 with the same result. I guess you have sphinx-rtd-theme 1.0.0 installed along the way. It lost compatibility with Documentation/conf.py. It has been fixed by commit d69dab7de208 ("docs: conf.py: fix support for Readthedocs v 1.0.0") in docs-next branch of the -doc tree. It is not merged upstream yet, though. In the meantime, you can restore the css setting by downgrading sphinx-rtd-theme by saying sphinx-rtd-theme<1.0 in requirements.txt. Hope this helps. BR, Akira