signal-desktop does not support fractional scaling on wayland about signal-desktop HOT 5 OPEN

Same issue on Fedora Workstation 40 (wayland and using 150% fractional scaling). This seems to be an issue on flatpaks that don't support Wayland natively and rely on XWayland (source).

@cuu508 I managed to get rid of this issue by editing my signal-desktop flatpak to run with the following flags: --enable-features=UseOzonePlatform --ozone-platform=wayland. To do so, I had to edit /var/lib/flatpak/exports/share/applications/org.signal.Signal.desktop, more specifically the flatpak run command to include those flags. Not blurry anymore for me. (see #5719)

Really wish this was the default for Wayland environments until Wayland is not supported natively.

Update: It was becoming a nightmare updating these run options on a per-app basis so the temporary solution I've found is to tweak the scaling factor on gnome-tweaks to 1.25 and keep the resolution scale at 100% on gnome-settings. Apps are not blurry anymore.

The Flatpak maintainers already did all that work. This is from the Readme:

Wayland support can also be enabled on the command line:
flatpak override --user --env=SIGNAL_USE_WAYLAND=1 org.signal.Signal

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@cuu508 can you run an Electron Fiddle and see if you can reproduce the issue? Thanks!

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I installed electron-fiddle_0.36.3_amd64.deb. Running it with no arguments, I get blurry UI (Electron Fiddle on top, GNOME Terminal below as comparison):

If I run it with --enable-features=UseOzonePlatform --ozone-platform=wayland arguments, I get sharp UI:

Unlike signal-desktop, the UI shows up on the first launch, and the app icon is correct in Alt+Tab and app overview views.

from signal-desktop.

@cuu508 thanks for that. The window not opening is a known issue; we're tracking it here: #6368.

from signal-desktop.

Same issue on Fedora Workstation 40 (wayland and using 150% fractional scaling). This seems to be an issue on flatpaks that don't support Wayland natively and rely on XWayland (source).

@cuu508 I managed to get rid of this issue by editing my signal-desktop flatpak to run with the following flags: --enable-features=UseOzonePlatform --ozone-platform=wayland. To do so, I had to edit /var/lib/flatpak/exports/share/applications/org.signal.Signal.desktop, more specifically the flatpak run command to include those flags. Not blurry anymore for me. (see #5719)

Really wish this was the default for Wayland environments until Wayland is not supported natively.

Update: It was becoming a nightmare updating these run options on a per-app basis so the temporary solution I've found is to tweak the scaling factor on gnome-tweaks to 1.25 and keep the resolution scale at 100% on gnome-settings. Apps are not blurry anymore.

from signal-desktop.