[Libreoffice-bugs] [Bug 106526] UI 4k Slide Presentation screen causes crash for x86, messed up for x64

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=106526

--- Comment #17 from craig at arno.com <craig at arno.com> ---
Unless otherwise specified, laptop display 3000x2000, external display
4096x2160.
Times are how long it takes for both screens to change and become available.

Without Hardware acceleration and without OpenGL screen redraw @4K:
  10 Seconds with Use Anti-Aliasing
  10 Seconds without Use Anti-Aliasing

To get OpenGL the Intel Integrated Graphics had to be selected in the NVIDIA
Control panel before OpenGL would stay selected @4K:
  10 Seconds with Use Anti-Aliasing
  11 Seconds without Use Anti-Aliasing

High-Performance NVIDIA processor, external display 1280x1024
With Hardware acceleration and without OpenGL screen redraw:
  3 Seconds with Use Anti-Aliasing
  4 Seconds without Use Anti-Aliasing

High-Performance NVIDIA processor, external display 1280x1024
Without Hardware acceleration and with OpenGL screen redraw:
  3 Seconds with Use Anti-Aliasing
  4 Seconds without Use Anti-Aliasing

High-Performance NVIDIA processor, external display 1280x1024
Without Hardware acceleration and without OpenGL screen redraw:
  3 Seconds with Use Anti-Aliasing
  4 Seconds without Use Anti-Aliasing

Intel Integrated Graphics, external display 1280x1024
With Hardware acceleration and without OpenGL screen redraw:
  3 Seconds with Use Anti-Aliasing
  4 Seconds without Use Anti-Aliasing

Intel Integrated Graphics, external display 1280x1024
Without Hardware acceleration and with OpenGL screen redraw:
  3 Seconds with Use Anti-Aliasing
  3 Seconds without Use Anti-Aliasing

Intel Integrated Graphics, external display 1280x1024
Without Hardware acceleration and without OpenGL screen redraw:
  4 Seconds with Use Anti-Aliasing
  4 Seconds without Use Anti-Aliasing


Seems like no matter what I do in 1280x1024 mode, LO Impress will take 3-4
seconds to paint both screens on an i7-4core Surfacebook, 16GB RAM. Selecting
either GPU doesn't seem to make a difference (I'm stunned).

Two of the three modes worked in 4K.  However the display took 10-11 seconds to
redraw at this resolution in the two working modes.

When running OpenGL, the presenter display on the Surfacebook had a bizarre
moving colored artifact constantly running along a diagonal from the bottom
left corner to the top right. As a presenter display, it was still usable, but
distracting.

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