Arch Linux

I should add that I also have a Ubuntu box and transitions work fine over there.

No problems here using an Intel gfx driven system with gtk2 vcl. I assume this to be a vcl /gfx card issue in hardware acceleration.

What vcl (gtk2/3,kde,generic) and graphic card do you use?

Greetings Andreas,

What does vcl stand for? I am guessing this might answer the first question:

$ kded5 --version
kded5 5.34.0

For the graphics card:

$ sudo lshw | grep -i "display" -A 11
*-display
description: VGA compatible controller
product: Oland PRO [Radeon R7 240/340]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:35 memory:e0000000-efffffff memory:f7e00000-f7e3ffff ioport:e000(size=256) memory:c0000-dffff

and more about the graphics card:

$ lspci | grep -i "VGA"
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Oland PRO [Radeon R7 240/340]


$ sudo lspci -v -s 01:00.0
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Oland PRO [Radeon R7 240/340] (prog-if 00 [VGA controller])
Subsystem: XFX Pine Group Inc. R7 240 2048 MB
Flags: bus master, fast devsel, latency 0, IRQ 35
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f7e00000 (64-bit, non-prefetchable) [size=256K]
I/O ports at e000 [size=256]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [200] #15
Capabilities: [270] #19
Kernel driver in use: radeon
Kernel modules: radeon, amdgpu

It is a Radeon R7 240.

I guess you're using the repo driver xf86-video-amdgpu or -ati.

You're running KDE it seems. I guess your vlc qill be kde4 that might be buggy or the mesa 3D acceleration. Try switching to gtk2 or generic vcl:
https://wiki.archlinux.org/index.php/LibreOffice#Theme

Anything in the system logs or in your terminal when starting libreoffice from command line?

$ pacman -Q | grep -i "xf86-video"
xf86-video-ati 1:7.9.0-1
xf86-video-fbdev 0.4.4-6
xf86-video-vesa 2.3.4-3

No error appears when running libreoffice from the commandline:

$ libreoffice
$

I did not see any logs get updated in the /var/log directory (which would hold an error?)

After editing:

/etc/profile.d/libreoffice-fresh.sh

and uncommenting the line:

export SAL_USE_VCLPLUGIN=gen

(also running that line in a terminal and starting libreoffice from the terminal) It started working.

Do you need any more information from me?

Thanks!

If transitions work with generic vcl this is probably a bug in either qt/kde or LibreOffice kde integration (kde vcl). Please get in touch with LibO upstream devs.

Done:

https://bugs.documentfoundation.org//show_bug.cgi?id=108433

Thanks!

Upstream bug was closed as "worksforme" because it works on Ubuntu.

Ubuntu has backported the fix from 5.4 to 5.3, the patch is "gtk3-opengl-slideshow.diff" which is included in http://archive.ubuntu.com/ubuntu/pool/main/libr/libreoffice/libreoffice_5.3.3-0ubuntu1.debian.tar.xz

Does it work now with 5.4.x ?

Yes, thanks!