Please provide details of your Windows build, your Graphics card and driver (run msinfo32.exe and look at the summary, and the components -> display panels).

Also, copy text from the LibreOffice main menu Help -> About LibreOffice so we know what build of LibreOffice you are having issues with.

Finally, if you see that LibreOffice is using OpenGL (the Renderer: string in that about dialog will be GL) please disable OpenGL rendering for LibreOffice from Tools -> Options -> View:  checkbox "Use OpenGL for all rendering (on restart)". Uncheck and close relaunch LibreOffice.

Retest the full screen mode toggle-- <Ctrl>+<Shift>+j

Thanks.

Disabled OpenGL rendering and fullscreen works properly now. If you have a spare minute, could you please explain very briefly what the difference is between OpenGL enabled and disabled. Many thanks.

A computer has a Graphics Processing Unit that composes the what the operating system and individual programs render to the display.

The GPU can have some form of hardware acceleration to offload processing from the CPU. The OS and drivers for the GPU will negotiate the amount of off loading.

OpenGL rendering provides an additional application programming interface that the OS and running programs can use to accelerate rendering, making more use of a GPUs processing capabilities.

Without OpenGL, the OS and GPU can still use hardware acceleration just not to the full potential capacity of the GPU. And that hardware acceleration can be further limited and the OS under program control performs the rendering.

In LibreOffice modules that can make use of OpenGL are enabled with the Tools -> Options -> View controls.  The downside is that if the OS / GPU / Driver implementation are not adequate to the task visual glitches of varying severity can occur.

On Windows OpenGL is enabled by default--if the GPU / Driver pairing passes a blacklist and simple functional check on launch.  If marginal or blacklisted, OpenGL rendering is disabled for that user profile. Visual glitches that appear otherwise can be avoided by disabling OpenGL rendering.

On Linux OpenGL is disabled by default because there are just too many combinations of OS / CPU / GPU and drivers to reliably have it enabled. And, users on Linux seem to have fewer issues in enabling performance features for their OS / Desktop environment including use of OpenGL if they find it to be stable. 

We're of course glad you've sorted things on your system. But we still need the details of OS / GPU / and Driver for the version of LibreOffice you had this issue with.

OP responded in PM... so looks to be a laptop with a discrete nVidia GPU and onboard Intel HD4600. Not clear if the system allows designation of which GPU handles a performance application. Could be LibreOffice is running on the Intel HD46000 and not the nVidia GPU.

Windows 10 Home, Version 10.0.14393 Build 14393

LO Version: 5.2.0.4 (x64)
Build ID: 066b007f5ebcc236395c7d282ba488bca6720265
CPU Threads: 8; OS Version: Windows 6.19; UI Render: default;
Locale: en-NZ (en_NZ)

Name NVIDIA GeForce GT 745M
PNP Device ID PCI\VEN_10DE&DEV_0FE3&SUBSYS_FA471179&REV_A1\4&1C48A39C&0&0008
Adapter Type GeForce GT 745M, NVIDIA compatible
Adapter Description NVIDIA GeForce GT 745M
Adapter RAM (2,147,483,648) bytes
Installed Drivers nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um,nvwgf2um
Driver Version 10.18.13.6869
INF File oem43.inf (Section015 section)
Color Planes Not Available
Color Table Entries Not Available
Resolution Not Available
Bits/Pixel Not Available
Memory Address 0xF6000000-0xF6FFFFFF
Memory Address 0xE0000000-0xEFFFFFFF
Memory Address 0xF0000000-0xF1FFFFFF
IRQ Channel IRQ 4294967293
Driver c:\windows\system32\drivers\nvlddmkm.sys (10.18.13.6869, 12.99 MB (13,617,096 bytes), 7/07/2016 7:37 PM)

Name Intel(R) HD Graphics 4600
PNP Device ID PCI\VEN_8086&DEV_0416&SUBSYS_FA471179&REV_06\3&11583659&1&10
Adapter Type Intel(R) HD Graphics Family, Intel Corporation compatible
Adapter Description Intel(R) HD Graphics 4600
Adapter RAM 1.00 GB (1,073,741,824 bytes)
Installed Drivers igdumdim64.dll,igd10iumd64.dll,igd10iumd64.dll,igd12umd64.dll,igdumdim32,igd10iumd32,igd10iumd32,igd12umd32
Driver Version 20.19.15.4331
INF File oem0.inf (iHSWM_w10_P0 section)
Color Planes Not Available
Color Table Entries 4294967296
Resolution 1920 x 1080 x 60 hertz
Bits/Pixel 32
Memory Address 0xF7400000-0xF77FFFFF
Memory Address 0xD0000000-0xDFFFFFFF
I/O Port 0x0000F000-0x0000F03F
IRQ Channel IRQ 4294967292
Driver c:\windows\system32\drivers\igdkmd64.sys (20.19.15.4331, 7.49 MB (7,858,088 bytes), 7/01/2016 5:44 PM)

Hope this helps. Thanks for your help. Raimund.

What strikes me oddly is that I didn't have any problems with full screen mode in previous LO versions.

Sorry, my last comment isn't quite right. I had same problem in May.

I've just found recent driver updates for Intel and nVidia. OpenGL works now in LO. There's only one slight but: when trying to put in fullscreen mode, LO crashes the very first time after each computer booting, afterwards no problem.

Closing this issue WFM.

Please keep up with drivers and report any new and reproducible issues in new bug report with detailed steps to reproduce and include details of OS, Hardware and drivers.

I have got a similar problem with full screen mode with a notebook, which has an onboard "Interl(R) HD Graphics 630" and a "NVIDIA Geforce GTX 1050 Ti" and Windows 10. There exists an automatic detection, which graphic card to use, so that the NVIDIA card is only used when needed, to reduce power usage. It seems, that this automatic detection does not work for OpenGL in LibreOffice.

The NVIDIA settings have an option to assign a graphic card to an application. If I set there, that NVIDIA is used for OpenGL in LibreOffice, then full screen mode works without problems.

[I have added this information here, because it might be useful for other users with similar problems.]