[Okular-devel] [Bug 279143] New: Okular's presentation mode does not update properly (rendering issues)

[Hans Meine]

https://bugs.kde.org/show_bug.cgi?id=279143

           Summary: Okular's presentation mode does not update properly
                    (rendering issues)
           Product: okular
           Version: 0.12.5
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: okular-devel at kde.org
        ReportedBy: hans_meine at gmx.net


Version:           0.12.5 (using KDE 4.6.5) 
OS:                Linux

Similar to bug #186464, I have problems with screen updates in presentation
mode.  However, in contrast to that old report, it does not give me a gray
screen, but when flipping through pages only parts of the screen will be
updated.  (Also, sometimes there seems to be a lag of one page, which is hard
to say definitely if there's only a small rectangular "window" in which there
is an update at all.)  Furthermore, I am using a stock (Ubuntu) KDE setup with
kwin.

This is with an Ubuntu 11.04 (Natty, with KUbuntu's KDE PPA) system with the
latest (280.13-0ubuntu1~natty~xup1) NVIDIA binary drivers (which I suspect to
play a role here), installed via the "x-updates" PPA, see below.

Reproducible: Didn't try

Steps to Reproduce:
Happens everytime I open a PDF, press Ctrl-Shift-P to enter presentation mode,
and try to navigate through the pages (normal & full-screen modes work fine).

In case anyone with a natty system (and maybe an NVIDIA) card wants to
reproduce this, I have the following PPAs enabled:

deb http://ppa.launchpad.net/kubuntu-ppa/ppa/ubuntu natty main
deb http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/ natty main

Actual Results:  
After pressing Ctrl-Shift-P, the current / title page is displayed in the size
of the original window in the upper left corner of the screen, the rest of the
screen contains large black or gray patches / rectangles.

When using PgUp/PgDown, parts of the screen (i.e. a vertical rectangle, roughly
but not exactly centered, overlapping with the above-mentioned small title
page) are updated, sometimes additional small patches are updated after a while
(without user interaction).

Switching desktops (Ctrl-F2, Ctrl-F1) lead to a proper screen refresh.

Expected Results:  
Correctly repaint the whole screen after entering presentation mode and when
switching between pages.

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