Screen sharing fails on debian 12

[schophil]

Hi,

I am on debian 12 - gnome 43.9 - Wayland. I have installed slack with flatpak ( 4.39.88 64-bit ).

Screen sharing does not seem to work. I already tried the following:

flatpak override --user --socket=wayland com.slack.Slack

and

flatpak run com.slack.Slack --enable-features=WebRTCPipeWireCapturer

I get the pop-up to choose the window of desktop. The yellow screen sharing button appears in the gnome toolbar once I select something. Bu the screen is not actually shared. No crashes.

[AKoskovich]

Please confirm that screensharing works with the .deb package on your distro.

[schophil]

Hi, I installed the .deb package and screensharing works. I have executed "Run test" in the audio & video troubleshooting section. The same test fails on screensharing with the flatpak version.

Perhaps a clue: On the .deb package version I get the gnome pop-up to choose the window/descktop twice after each other. On the flatpak version I get it only once and nothing more happend. The test also looks hanging on that point.

[AKoskovich]

I can reproduce this on Debian 12. It appears to be an issue with some of the xdg-portal stuff, likely because packages on Debian 12 are extremely old.

I tried on Debian 13 (testing, trixie) and can share the screen no problem.

Would just wait until the next release comes out or upgrade to testing.

[gdesmott]

I have this problem as well with Fedora 42.

[pasunboneleve]

The 4.43.52 flatpack fails at screen sharing, but the rpm download works out of the box! (Fedora 42)

[AKoskovich]

The 4.43.52 flatpack fails at screen sharing, but the rpm download works out of the box! (Fedora 42)

Took a look, it seems like when running as a Flatpak it doesn't even attempt to use the portal if under XWayland, and no errors are popping up either. If you force Wayland with 'flatpak override --user --socket=wayland com.slack.Slack', then screen sharing works but that has it's own issues still.