Change/fix app font

I am using OnlyOffice Desktop Editors on Ubuntu 22.04 LTS. I am trying to figure out how to change or fix the broken font for the tabs (see attached screenshot).

Hello @mike_s :wave:

  1. Could you please let me know if the issue with displaying the custom font in the document tab occurs with all documents or just with a specific one?

  2. Is the problematic font always the same, or does it vary between documents?
    (If possible, please provide the name of the font you are using.)

  3. Have you added or modified custom fonts in your operating system?

  4. Did the issue appear immediately after installing ONLYOFFICE Desktop Editors?

Thank you.

Let’s try regenerating the fonts.

  1. Close ONLYOFFICE Desktop Editors.
  2. Clear the contents of this folder


and then start ONLYOFFICE Desktop Editors.

  1. The issue occurs when opening any document in OnlyOffice Desktop Editors.

  2. The font in the tab is always the same.

  3. I have added a lot of custom fonts to my system but the one that ends up being used in the OnlyOffice Desktop Editors tab is not one that I’ve personally added.

  4. Yes.

I installed OnlyOffice Desktop Editors via flatpak so the fonts folder is in a different location (/.var/app/org.onlyoffice.desktopeditors/data/onlyoffice/desktopeditors/data/fonts/), but I tried removing the contents of the fonts folder and re-opening OnlyOffice Desktop Editors and the broken font still appears in the tab when I open a document.


Please archive the contents of the directory and provide a link to an external storage. Here’s the directory path:


We’ll investigate to understand what the issue might be.

Thank you, Nikolas. Here is a link to the fonts directory archive.

1 Like

Thank you for your patience. We need some time to analyze the available data.

Could you please confirm if you are using version OO Desktop 8.1.0?

Please provide the output of the following commands:

fc-match Arial
fc-match Helvetica
fc-match 'Helvetica Neue'
fc-match sans-serif

Yes, OO Desktop 8.1.0 is the version I have installed.

fc-match Arial

Output: Arial.ttf: “Arial” “Regular”

fc-match Helvetica

Output: NimbusSans-Regular.otf: “Nimbus Sans” “Regular”

fc-match ‘Helvetica Neue’

Output: DejaVuSans.ttf: “DejaVu Sans” “Book”

fc-match sans-serif

Output: DejaVuSans.ttf: “DejaVu Sans” “Book”

That’s strange. According to your configuration, the Arial font should be applied immediately.

Could you please provide three font files from your system:

  • Arial.ttf: “Arial” “Regular
  • NimbusSans-Regular.otf: “Nimbus Sans” “Regular”
  • DejaVuSans.ttf: “DejaVu Sans” “Book”

This is because the font selection is prioritized in that exact order.

Here are those font files.

Thank you for providing fonts.

All fonts appear to be in order.
Unusual behavior. Never encountered this before 0_o

Let me try to reproduce the issue. If it’s possibly related to fonts, could you please provide a list of all fonts installed on your system?