attachment 106922 [details] is a PDF form I created with the latest pdflatex. It fulfils the PDF form specification as is used as reference PDF for for the program LyX. The PDF looks and works fine using Adobe Reader under windows. Under Linux using Okular 1.1.3 there are several bugs. (attachment 106923 [details] is the TeX source code of the form.) This report is about executing the basic actions of PDF forms: - open the PDF and go to sec. 2.5 and 2.6 - There you have each 1 button. Click one of them. result: nothing happens. But a submit and the reset buttons are essential features of a PDF form! If these are not supported one cannot use Okular for forms. But Okular advertises that it can handle forms.
The bug is still in Okular 1.11 (tested on Windows using the nightly build 585).
The bug is still present in Okular 21.04.3, Plasma 5.21.5, 5.82.0, Gentoo Linux with kernel 5.13.10. Filling the form seems to work fine, but the submit button seems to take no action.