Comment 4 for bug 44007

After a quick look at the KDVI package it seems shortcuts are absolutely not defined in each package: this is something orthogonal to all applications.

So can you have a look into KDE Control Center, Regional & accessibility, Keyboard shortcuts. The 3rd tab (application shortcuts) is where all default shortcuts for KDE are defined. Here you should have PgUp and PgDn defined. You can try to change your scheme.

As a last resort, could you try to create a new user and check whether the problem remains.