GNU bug report logs - #52031
gnome-terminal fails to start under sway on core-updates-frozen

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jack Hill <jackhill <at> jackhill.us>
To: bug-guix <at> gnu.org
Subject: gnome-terminal fails to start under sway on core-updates-frozen
Date: Mon, 22 Nov 2021 00:10:50 -0500 (EST)

Hi Guix,

With core-updates-frozen commit b033079e47357dcf77ebeeb52b0a5306cd6aa982 
gnome-terminal fails to start under sway either as launched from gdm or 
directly from a vt with `dbus-run-session sway`.

```
$ gnome-terminal
# Error constructing proxy for org.gnome.Terminal:/org/gnome/Terminal/Factory0: Error calling StartServiceByName for org.gnome.Terminal: Process org.gnome.Terminal exited with status 10
```

It works correctly in a gnome session.

Best,
Jack

Message #8 received at 52031 <at> debbugs.gnu.org (full text, mbox):

From: Jack Hill <jackhill <at> jackhill.us>
To: 52031 <at> debbugs.gnu.org
Cc: Josselin Poiret <dev <at> jpoiret.xyz>
Subject: Re: bug#52031: gnome-terminal fails to start under sway on
 core-updates-frozen
Date: Mon, 22 Nov 2021 14:59:13 -0500 (EST)

On Mon, 22 Nov 2021, Jack Hill wrote:

> Hi Guix,
>
> With core-updates-frozen commit b033079e47357dcf77ebeeb52b0a5306cd6aa982 
> gnome-terminal fails to start under sway either as launched from gdm or 
> directly from a vt with `dbus-run-session sway`.
>
> ```
> $ gnome-terminal
> # Error constructing proxy for 
> org.gnome.Terminal:/org/gnome/Terminal/Factory0: Error calling 
> StartServiceByName for org.gnome.Terminal: Process org.gnome.Terminal exited 
> with status 10
> ```
>
> It works correctly in a gnome session.

Josselin Poiret determined [0] that the root cause of this behavior is 
that gnome-terminal is being launched via dbus, but the bus doesn't know 
about the wayland display, so can't start graphical applications. 
Everything works as expected if dbus is told about the display, which can 
be done by adding the following like to the sway configuration:

```
exec dbus-update-activation-environment WAYLAND_DISPLAY
```

In my judgment, this issue shouldn't hold up the core-updates-frozen 
merge, but it would be nice to improve the out-of-the-box sway experience 
in the future. A possible way I see is a sway service type that puts the 
necessary configuration in /etc/sway/conf.d or otherwise installs a 
session .desktop file that performs the necessary setup.

[0] https://logs.guix.gnu.org/guix/2021-11-22.log#172513

Thoughts?
Jack

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