Comment # 1 on bug 1005336 from Karl Knall

I confirm unacceptable slowness (and hardly readable Raleigh menus) after
update to LibreOffice 5.1.5.2, somehow linked to OpenGL and GTK3.

I use Leap 42.1 with XFCE desktop and Raleigh style. After recently updating to
nvidia driver 367.57 and LibreOffice 5.1.5.2 from the official repos, Writer
reacted very slowly to both keyboard and mouse input, esp. with large text
files. Installing libreoffice-gtk3 remedied this largely, but far from
perfectly. In any case, LibreOffice menus (e.g., Writer and Calc), which are
black text on light grey background, turn to black on dark blue as soon as the
mouse pointer moves across them, with white on dark blue for the single menu
line on which the mouse pointer currently is. These colors are unergonomic, the
black on dark blue hardly readable. (Firefox 49.0 menus keep working normally
with Raleigh.)

The new behavior seems to be connected to a move, by the developers, from GTK2
to GTK3 and from Raleigh to Adwaita as default theme. It does not depend on the
user-selected LibreOffice theme; it's the same with Breeze, Galaxy (my
favorite), High Contrast, Oxygen, Sifr, Tango (default), but depends on the
user-selected XFCE "desktop appearance" style. When I switch the XFCE style
from Raleigh to Adwaita or oxygen-gtk, I get acceptable menu colors (dark text
on light background). However, I would prefer Raleigh over Adwaita or
oxygen-gtk. (De gustibus non est disputandum.)

After said upgrade, the two "OpenGL" checkboxes under LibreOffice -> Tools ->
Options -> LibreOffice -> View -> Graphics Output are missing; under
LibreOffice -> Tools -> Options -> LibreOffice -> Advanced -> Expert
Configuration, I can see that both (UseOpenGL, ForceOpenGL) are set to "false".
This seems to correspond to entries in /home/<user
name>/.config/libreoffice/4-suse/user/registrymodifications.xcu.

"glxinfo | grep OpenGL" yields:

OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTX 660 Ti/PCIe/SSE2
OpenGL core profile version string: 4.4.0 NVIDIA 367.57
OpenGL core profile shading language version string: 4.40 NVIDIA via Cg
compiler
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 4.5.0 NVIDIA 367.57
OpenGL shading language version string: 4.50 NVIDIA
OpenGL context flags: (none)
OpenGL profile mask: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 367.57
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:

I posted this observation in the same forum thread as the bug reporter (see his
link).