Bug#916846: [libreoffice-ogltrans] Blank screen with OpenGL transitions

[Rene Engelhard <rene@debian.org>]

found 916846 1:6.0.1-1
tag 916846 + confirmed
thanks

Hi,

On Wed, Dec 19, 2018 at 04:51:58PM +0300, Alexander Kernozhitsky wrote:
> Package: libreoffice-ogltrans
[...]
> Severity: grave
> Justification: renders package unusable

Sigh. And "just" becaus it's in an own package and that packages solely
purpose is this...  :(

> When I try to use OpenGL transitions in LibreOffice Impress, I get a bank 
> screen for several seconds instead of a transition. This issue seems to be 
  ^^^^^^^^^^^^^^^^^^^^^^^^^^
  OpenGL, so 3D, so slow(er) :)

> Debian-specific; I was trying the upstream version and it works fine.

And when the actual transition should happen I get "blurry" stuff until
the next slide is there. So yes, confirmed :-(

> Hardware acceleration is enabled in configuration; renderer I use is

Which does not do what you think it does. It does not to "hardware
acceleration" in the first place. It afaicr is "Use cairo".

> Mesa DRI Intel(R) HD Graphics 620 (Kaby Lake GT2)

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])

here, whatever that is exactly :-)

> Upstream bug report:
> https://bugs.documentfoundation.org/show_bug.cgi?id=115716

Ah, so since 6.0.1? If you know such stuff, please mark it correctly...

That said, we don't patch OpenGL parts or parts which could possibly
affect it and don't do a "custom" splitout of this either...

So it probably some system library at fault. Or some integration, though
apparently it happens with both gtk3 and "gen"... In both cases that is
still a upstream bug (, too).

Maybe we should just stop shipping them, no one needs it.

Regards,

Rene