Interface Rendering on Ubuntu 20.04 LTS

[mamyt]

I’m having a strange rendering issue with LO’s interface: the bottom of the LO window appears to be duplicated (see screenshot).

I haven’t been able to pin down what exactly is going on, but I believe I’ve only seen this issue occurring on an external monitor. At the moment, my laptop screen is disabled, and I’m connected to two external monitors.

Some possibly relevant info about my system:

Ubuntu 20.04.3 LTS
ASUS ZenBook Q536FD
Kernel: 5.13.0-28-generic
DE: Plasma
WM: KWin
External monitor resolution: 2560x1440
Laptop monitor resolution: 3840x2160
Theme: Adwaita Dark KDE (Plasma), Breeze [GTK2/3]
Icons: Sweet-Blue [Plasma], Sweet-Blue [GTK2/3]

Thanks for any guidance you can provide, and please let me know if there is other info I could provide that would be helpful.

[joshua4]

Just for troubleshooting, you might report on trying any of the following:

1. Edit/toggle the Options>LibreOffice(Header at left)>View(Subheader at left)>Graphics Output options.
2. Try starting LO in safe mode. LibreOffice user profile - The Document Foundation Wiki
3. Try a generic VCL by starting office from terminal window with SAL_USE_VCLPLUGIN=gen /opt/libreoffice7.2/program/soffice

Of course, each of these may require restarting LO to test.

I’d also be curious to know what happens if you have a panel bar at the bottom of the external monitor. Perhaps the desktop is hiccupping on an old panel setting on the external monitor??

[mamyt]

Thanks, I will give these a shot in the next day or two.

I saw that you referred to this thread in another and wanted to confirm that I’ve seen this happen in prior versions, though the screenshot is from 7.2.3.

[mamyt]

I just saw this issue again when hooking up to the external monitor. After a reboot conducted to reduce global scaling on the external monitors, LO appears perfectly.

I suspect, then, that the problem has something to do with switching from the laptop screen to the external monitor. (I doubt global scaling had anything to do with it because I’d been seeing the rendering issue for a long time under what I’m pretty sure were many global scales.)

Would you still like me to try those troubleshooting steps, or is there something else I can try out given the additional information? I’d like to help find the source of the problem if useful to the devs.

[mamyt]

Turned out that restarting was not a cure. Today, I hooked up to the external monitor, saw the problem, restarted, and the problem persisted. I actually forgot to mention that in addition to the double footer, the menus at the top are also partially hidden. Anyhow, I went through the steps you suggested:

1. Toggled both hardware acceleration and antialiasing and restarted LO. No change in LO’s appearance.
2. Started LO in safe mode. No change in LO’s appearance.
3. Ran the command you suggested from the terminal (substituting 7.3 for 7.2): menu and footers appeared correctly, but LO no longer took the system theme, which I assume was the intended effect.

Also, I do have a panel bar at the bottom, set to auto-hide.

[ajlittoz]

I notice you’re under KDE Plasma desktop. It requires a special Qt widget interface module. By default, all distros I know of configure LO for GTK+ widgets which are the default widget collection for GNOME and derivatives.

Under Fedora, the package is named libreoffice-kf5. See if it is installed.

You can tell if this is necessary by displaying Tools>About LibreOffice. If you read VCL: gtk or gtk3, then you need to install the kf5 widget interface package.

Not sure if this will cure the problem since you made a try with the gen widget interface.

[mamyt]

Thanks. Just checked and VCL is listed as kf5.