libreoffice window mangled when using dual monitors

Hi all,
Since upgrading to 15.3, Libreoffice’s window seems wrapped around, with parts of it missing, see picture below. It happens when I have 2 screens attached, single monitor use is ok. Un- and then reinstalling libreoffice does not help. Does anyone have any ideas?
Many thanks in advance, gerard
https://home.hku.nl/~gerard.ranke/Screenshot_libreoffice.png

I can’t tell from that tiny image what it purports to show.

Are you using Plasma?

What does sudo inxi -U; inxi -Gay with both displays on and working normally report?

Thanks for your quick reply! Here’s with 2 monitors:

Starting inxi self updater.
Using tiny as downloader.
Currently running inxi version number: 3.1.00
Current version patch number: 00
Current version release date: 2020-04-22
Updating inxi in /usr/bin using main branch as download source…
Successfully updated to main branch version: 3.3.08
New main branch version patch number: 00
New main branch version release date: 2021-10-21
To run the new version, just start inxi again.

Starting download of man page file now.
Downloading Man page file…
Download successful. Compressing file…
Download and install of man page successful.
Check to make sure it works: man inxi
Graphics:
Device-1: Intel UHD Graphics 615 vendor: Dell driver: i915 v: kernel
bus-ID: 00:02.0 chip-ID: 8086:591c class-ID: 0300
Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo
bus-ID: 1-9:4 chip-ID: 0bda:5690 class-ID: 0e02 serial: 0001
Display: x11 server: X.Org 1.20.3 compositor: kwin_x11 driver:
loaded: modesetting display-ID: :0 screens: 1
Screen-1: 0 s-res: 4480x1800 s-dpi: 168 s-size: 676x272mm (26.6x10.7")
s-diag: 729mm (28.7")
Monitor-1: eDP-1 res: 3200x1800 hz: 60 dpi: 276 size: 294x165mm (11.6x6.5")
diag: 337mm (13.3")
Monitor-2: DP-1 res: 1280x800 hz: 60 dpi: 150 size: 217x136mm (8.5x5.4")
diag: 256mm (10.1")
**OpenGL:**renderer: Mesa DRI Intel UHD Graphics 615 (AML-KBL)
v: 4.6 Mesa 20.2.4 compat-v: 3.0 direct render: Yes

And with just one:

[FONT=monospace]Starting inxi self updater.
Using tiny as downloader.
Currently running inxi version number: 3.3.08
Current version patch number: 00
Current version release date: 2021-10-21
Updating inxi in /usr/bin using main branch as download source…
Validating downloaded data…
Successfully updated to main branch version: 3.3.08
New main branch version patch number: 00
New main branch version release date: 2021-10-21
To run the new version, just start inxi again.

Starting download of man page file now.
Updating inxi.1 in /usr/share/man/man1
using main branch branch as download source
Downloading man page file…
Download successful. Validating downloaded man file data…
Contents validated. Writing to man location…
Writing successful. Compressing file…
Download, install, and compression of man page successful.
Check to make sure it works: man inxi
Graphics:
Device-1: Intel UHD Graphics 615 vendor: Dell driver: i915 v: kernel
bus-ID: 00:02.0 chip-ID: 8086:591c class-ID: 0300
Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo
bus-ID: 1-9:4 chip-ID: 0bda:5690 class-ID: 0e02 serial: 0001
Display: x11 server: X.Org 1.20.3 compositor: kwin_x11 driver:
loaded: modesetting display-ID: :0 screens: 1
Screen-1: 0 s-res: 3200x1800 s-dpi: 168 s-size: 483x272mm (19.0x10.7")
s-diag: 554mm (21.8")
Monitor-1: eDP-1 res: 3200x1800 hz: 60 dpi: 276 size: 294x165mm (11.6x6.5")
diag: 337mm (13.3")
**OpenGL:**renderer: Mesa DRI Intel UHD Graphics 615 (AML-KBL)
v: 4.6 Mesa 20.2.4 compat-v: 3.0 direct render: Yes

Here is a screenshot that is hopefully better:
https://home.hku.nl/~gerard.ranke/Screenshot_Libreoffice.png

[/FONT]

Inxi -U only needed to be run once, to update to a non-ancient inxi version. openSUSE packagers provide recent inxi only to TW users.

Start by logging out of Plasma, then logging in on a vtty to remove the content from ~/.cache/ before restarting Plasma.

I’m guessing this is a multipart problem, in part the fault of Plasma, another part LibreOffice, and possible part the display driver, or any combination of the three. You might ask help of the Intel driver writers on their mailing list.

Have you configured KScreen for the extra display? If yes, you could try disabling KScreen, then restart Plasma. If it helps, then asking the KDE specialists would be in order. There may be a known problem and/or workaround. I know mixtures of HiDPI screens with common low density screens can be a big pain to get working acceptably.