Unusable UI: flickering with huge blurred avatar image

[plata]

The UI flickers between the normal UI and the screenshot above (which seems to be huge blurred avatar image on the left and the background on the right). Apparently, the flickering is triggered by mouse movement, i.e. if the mouse doesn't move, there's no flickering.

Also, it happened only after I logged in. When I viewed some room as a guest, it seemed to be fine.

I've delete ~/.var/app/im.riot.Riot to ensure that it's not an issue with caches but that didn't help.

No idea if this is specific to the Flatpak or an upstream issue.

Used system: Fedora 40 Kinoite

[AlanLatte]

Hi, @plata, I encountered the same issue. Here's what helped me:

1. Removed im.riot.Riot.
2. Cleared app data with the following commands:

   flatpak uninstall --delete-data
   flatpak uninstall --delete-data --user
   

3. Reinstalled Element.
4. Set permissions in Flatseal as shown in the screenshots below.
5. Disabled Preferences > Enable hardware acceleration in Element (restart Element to apply changes).
6. Added the following environment variable in Flatseal:

   ELECTRON_OZONE_PLATFORM_HINT=x11
   

After these steps, Element stopped flickering.
Hope this helps!