The numeric keypad on my laptop is not working with modifier keys. For example, the keys to switch tabs are Ctrl+PgUp in Nautilus and Gnome Terminal and Ctrl+Alt+PgUp in gedit. These keys work when I use the PgUp key next to right Ctrl, but they don't work in these programs when I am using PgUp on the numeric keypad. However, Ctrl+PgUp does switch tabs in Firefox and Chrome. Without the modifier keys the numpad keys work fine. For example, I can move around using arrows and PgUp/PgDn in gedit.
NumLock and Universal Access > Mouse Keys are turned off. In Gnome Tweaks I set "Num Lock off: arrow keys (as in Windows)" under "Miscellaneous compatibility options", but it does not seem to make a difference. I am using Ubuntu 19.04 with Gnome and X11.
