[okular] [Bug 398443] New: okular sometimes goes into a state where "space" is recognized for navigation, but not "delete" or "pageup/pagedown"

[Frederick Eaton]

https://bugs.kde.org/show_bug.cgi?id=398443

            Bug ID: 398443
           Summary: okular sometimes goes into a state where "space" is
                    recognized for navigation, but not "delete" or
                    "pageup/pagedown"
           Product: okular
           Version: 1.5.1
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: frederik at ofb.net
  Target Milestone: ---

I've experienced this problem for a while now. Randomly, I'll open a PDF
document, say via a text-based web browser, in Okular. I'll use "space" or the
mouse wheel to navigate down the document. However, when I hit "delete" the
keypress is ignored. Same with "pageup" and "pagedown" - ignored. But if I use
the mouse and click on the document, then it fixes things and I can navigate
with these keys again.

Unfortunately I haven't found a way to reproduce this. It happens every day,
but it may be dependent on a race condition or something because I can't make
it happen on demand. Maybe I am doing a particular thing without realizing it,
e.g. starting to type before the document comes up. Or maybe it only happens on
new documents that Okular hasn't seen before. Usually when I open a document,
all keys work for navigation at startup.

I use the i3 window manager and the w3m web browser. I'm not sure if the bug is
dependent on opening a document with w3m.

I know this isn't much to go on but I wanted to submit here because I'm not
making any progress on getting more information, and I thought maybe somebody
familiar with the code of Okular could say what is happening. It seems that
something is going on related to focus. Is there a focus state where Okular
responds to "space" but not "delete" for navigation?

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