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Bug 1937990

Summary:	thunderbird-wayland started Thunderbird on X in Plasma
Product:	[Fedora] Fedora	Reporter:	Matt Fagnani <matthew.fagnani>
Component:	thunderbird	Assignee:	Gecko Maintainer <gecko-bugs-nobody>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	34	CC:	erack, gecko-bugs-nobody, joshua.ferguson.273, kai-engert-fedora, pjasicek, rhughes, rstrode, sandmann, zebob.m
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OS:	Unspecified
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Description Matt Fagnani 2021-03-11 21:11:35 UTC

Description of problem:

When I've started Thunderbird on Wayland from thunderbird-wayland in Plasma 5.21.2 and earlier in a Fedora 34 KDE Plasma installation, Thunderbird was started on X. The Troubleshooting information page when running thunderbird-wayland showed Window Protocol x11

Thunderbird on Wayland started with MOZ_ENABLE_WAYLAND=1 thunderbird showed Window Protocol wayland

Version-Release number of selected component (if applicable):
thunderbird-wayland-78.8.0-1.fc33.x86_64
gtk3-3.24.26-1.fc34.x86_64

How reproducible:
This occurs every time I've started thunderbird-wayland in Plasma on Wayland.

Steps to Reproduce:
1. Boot a Fedora 34 KDE Plasma installation updated to 2021-3-11 with updates-testing enabled
2. Log in to Plasma 5.21.2 on Wayland
3. If thunderbird-wayland isn't installed, install it with
sudo dnf install thunderbird-wayland
4. Open the Application Launcher menu
5. Type Thunderbird on Wayland in the search bar
6. Select Thunderbird on Wayland
7. Select Help > Troubleshooting Information in Thunderbird
8. Look at Window Protocol in the Graphics section of the Troubleshooting Information page

Actual results:
thunderbird-wayland started Thunderbird on X in Plasma

Expected results:
thunderbird-wayland would start Thunderbird on Wayland in Plasma

Additional info:
I upgraded to thunderbird-78.8.0-1.fc33.x86_64 from koji because thunderbird 78.8.0 isn't available in F34 due to a build failure. thunderbird-78.7.0-2.fc34 was also affected. Running thunderbird-wayland started Thunderbird on Wayland in GNOME 40 beta.

Comment 1 Joshua Ferguson 2021-04-08 13:14:34 UTC

can confirm this is also the case with sway on fedora 33.

setting the mentioned environment variable (MOZ_ENABLE_WAYLAND=1) also fixed the issue in my case. 

potentially relevant info:

- sway : v1.5
- thunderbird: 78.8.1

Comment 2 Robert-André Mauchin 🐧 2021-04-21 23:32:01 UTC

Apparently it checks if the desktop is GNOME to enable Wayland, unlike Firefox


cat /usr/bin/thunderbird-wayland
#!/usr/bin/bash
#
# Run Thunderbird under Wayland
#

##
## Enable Wayland backend?
##
if [ "$XDG_CURRENT_DESKTOP" == "GNOME" ]; then
  export MOZ_ENABLE_WAYLAND=1
fi
exec /usr/bin/thunderbird "$@

Comment 3 Robert-André Mauchin 🐧 2021-04-21 23:34:26 UTC

Tested it with Wayland: very buggy, the app keeps flickering.