Element Desktop screensharing does not work.

[strobili]

Description

When attempting to screen share on the Element Desktop app, it fails with two varying errors seemingly picked at random.

Steps to reproduce

• Shift-click with your left click on the camera icon in a DM/room to attempt to start a screen sharing call on the desktop app.

When attempting to start a screen sharing call, I would expect to start a screen sharing call as the web version works fine.

• Logs being sent: No

Screenshots

• (The Second one is a lot less common and most often happens after ending a normal voice call and then trying to start a screen sharing call.)

Version information

• Platform: Desktop
• OS: Arch Linux
• Version: Arch does not have any specific "versions" as it's a rolling release. The best I can do is provide the date at which I installed it: August 15th, 2020.

[t3chguy]

Regressed by matrix-org/matrix-js-sdk#1276

[ixxie]

I'm reproducing the second error message.

• Platform: Desktop
• OS: NixOS (unstable channel)
• Version:
  • Element version: 1.7.5
  • olm version: 3.1.3

[jezekus]

Hello I am getting same error: "Failed to get screen-sharing stream: NotAllowedError: Permission denied"

• Platform: Linux Desktop
• OS: Fedora 32
• Version:
  • Element: 1.7.8
  • olm: 3.1.3

[Kommynct]

I think the goal should be to support xdg-desktop-portal for wayland setups, right?

[sizek]

Same issue,

Platform: Linux Desktop
OS: Ubuntu 18.04
Version:
Element: 1.7.8
olm: 3.1.3

[r4dh4l]

Same here pressing the video call button holding shift key:

Call Failed
Failed to get screen-sharing stream: NotFoundError: Requested device not found

Platform: GNU/Linux Desktop
OS: Debian 10.6
Element version: 1.7.10
olm version: 3.2.1

[CarsonVB]

Call Failed
Failed to get screen-sharing stream. :NotAllowedError: Permission denied
or
Call Failed
Failed to get screen-sharing stream. :NotFoundError: Requested device not found

Platform: Windows Desktop App
OS: Windows 10
Element version: 1.7.11
olm version: 3.2.1

[QEDeD]

Call Failed
Failed to get screen-sharing stream: : NotAllowedError: Permission denied

Platform: Desktop
OS: Windows 10
Version: Version 10.0.19041 Build 19041
Element version: 1.7.12
Olm version: 3.2.1

[JPustkuchen]

Same problem here on windows.

After the error message you can't create a regular call anymore. The error says "You're already in a call"

Platform: Desktop
OS: Windows 10
Version: Version 10
Element version: 1.7.13
Olm version: 3.2.1