I've installed Jetpack v2.9.3 specifically so I could markdown in my pages and posts. I've activated the markdown module and I can find a new setting for activating markdown on the "discussion" settings page, but no settings at all on the "writing" settings page. And on individual pages and posts there's no option to use markdown or not.
I thought perhaps markdown was automatically activated, but when I enter markdown formatted text in a page or post and then preview it, the preview just shows the raw markdown code: there's no conversion.
As an experiment I installed the "Markdown on Save Improved" plugin and it works perfectly, even with the Jetpack markdown module enabled. But the Markdown on Save Improved is deprecated and the author recommends using the Jetpack markdown module.
I tried deactivating the Jetpack plugin and reactivating, but that didn't fix anything.
Any ideas why the Jetpack markup isn't showing up or working?