[Libreoffice-bugs] [Bug 116443] New: SLIDESHOW: Fade transition flickers, then flashes the previous slide.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=116443

            Bug ID: 116443
           Summary: SLIDESHOW: Fade transition flickers, then flashes the
                    previous slide.
           Product: LibreOffice
           Version: 6.0.0.3 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: hutchwit at msn.com

Description:
The fade transition is erratic and renders the program unusable in a
professional situation.

Steps to Reproduce:
The file Flicker_Demo.odp demonstrates the problem with a show of 3 slides.

Actual Results:  
Each slide has a fade transition (through black, 2 sec. duration). Each slide
flickers at the start and end of each fade. Also(although difficult to see),
Slide 1 flashes for a fraction of a second while slide 2 is fading in.
Similarly, Slide 2 flashes while Slide 3 is fading in.

Expected Results:
Each slide should fade out smoothly to black and then fade in to the following
slide.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
I'm running Windows 7, 64-bit OS with an Intel i3-4170 CPU @3.70 GHz and 8 GB
RAM. The graphics are run with the onboard Intel HD chipset. Under
Tools>Options>LibreOffice>View, I have tried various permutations of the
"Graphics Output" options (hardware acceleration,anti-aliasing, Open GL). There
may be subtle variations (difficult to see) but none are satisfactory. The
flash of the previous slide is very brief; it's close to the display's refresh
rate and does not always occur.

When the same file runs on an old (2009) MacBook Pro (OS X 10.11.6 with a 3.06
GHz Intel Core 2 Duo, 8 GB RAM, NVIDIA 9400M integrated graphics), the fade
transitions are flawless; with or without Open GL.  


User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101
Firefox/59.0

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