https://bugs.documentfoundation.org/show_bug.cgi?id=95300

--- Comment #6 from ullix <ul...@urkam.de> ---
Well, the real cause for the bug is the screen resolution. The apparent
correlation with age of CPU (my comment #5) is merely a consequence of older
systems not supporting modern screen resolutions.

When I give a presentation, I almost never know what hardware the host is
providing and don't have the time to figure out, what setting of my laptop can
be used to work. This problem must be solved, I am getting desperate!

Keep in mind that this issue currently shows on the non-LTS versions of Ubuntu.
Once the 16.04 LTS is available and more widely in use, and modern equipment
becomes more generic, the issue will likely be hitting many others!

I tested my DELL XPS13 with different screen resolutions on either the internal
monitor, or an external one, or both:

A-Rat is Aspect-Ratio Horizontal / Vertical
Pixelcount in Megapixels 

Hori x Vert ... working? ... A-Rat ... Pixelcount
1920 x 1200 ... fail ....... 1.60 .... 2.30
1920 x 1080 ... fail ....... 1.78 .... 2.07
1680 x 1050 ... fail ....... 1.60 .... 1.76
1600 x 1200 ... fail ....... 1.33 .... 1.92
1600 x 1024 ... fail ....... 1.56 .... 1.64
1400 x 1050 ... fail ....... 1.33 .... 1.47

1600 x 900 .... ok ......... 1.78 .... 1.44
1440 x 900 .... ok ......... 1.60 .... 1.30
1368 x 768 .... ok ......... 1.78 .... 1.05
1280 x 1024 ... ok ......... 1.25 .... 1.31
1280 x 960 .... ok ......... 1.33 .... 1.23
1024 x 768 .... ok ......... 1.33 .... 0.79
640 x 480 ..... ok ......... 1.33 .... 0.31

The aspect ratio can be excluded as cause, but the Pixelcount somehow may be
the culprit. This is further supported from the result of using the internal
monitor and the external one simultaneously. The 1280x960 resolution working ok
on a single monitor failed on a 2-monitor setup, as if the total pixelcount of
interal + external may be relevant. But there are too many variables to try
further.

Any buffers in Libreoffice at their limit?

Please, help.

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