Where is QT_QPA_PLATFORM=wayland set?

English Install/Boot/Login
1

Hi all,

I want to get rid of QT_QPA_PLATFORM=wayland in my standard “gnome for xorg” session.
Unfortunately I cannot find where it is set.

I checked

  • /etc/profile
  • /etc/profile.d
  • /etc/bash.bashrc
  • /etc/bashrc.local
  • ~/.profile
  • ~/.bashrc

Any ideas where this could come in?

P.S.
I just created a new user and it has not set the variable. So it is not a system default, but an individual user setting.

2

Check process environment upwards, if some process has it but its parent does not, most likely it is the parent that sets this variable.

1 Like
3

ps -ef shows

joachim  24900 25543  0 13:05 ?        00:00:13 /usr/libexec/gnome-terminal-server
joachim  25543     1  0 Jan09 ?        00:00:26 /usr/lib/systemd/systemd --user

Parent systemd doesn’t have it. Child gnome-terminal-server does.

But it is not in one of the accessed files during startup of gnome-terminal-server.
Checked with

job4:~ > files=`strace /usr/libexec/gnome-terminal-server 2>&1 | grep ^open | grep -v ENOENT | awk -F'"' '{print $2}'` 
job4:~ > for f in $files ; do grep QT_QPA_PLATFORM $f; done

So systemd somehow sets this for me. Where, why or how I still don’t know…

4

Is it in systemd environment?

systemctl --user show-environment
1 Like
5

yes it is!

6

systemd/User - ArchWiki lists tons of places where environment variables could be set - so far non found…

This wayland stuff keeps being a nightmare… :frowning:

7

For the record:

after weeding through files

/etc/profile
/ect/profile.d/
/etc/bashrc.*
~/.bashrc
~/.profile
~/.config/environment.d/
/etc/systemd/user.conf
/etc/systemd/system/user*/
/etc/systemd/user.conf
/usr/lib/systemd/
/etc/systemd/

and not finding either hints on more environment configuration files or the variable itself I remembered that I had commented out the QT_QPA_PLATFORM variable in my .bashrc earlier today.
The variable vanished from my X user environment only after a full reboot. Logout/login was not enough…

I wish this would be more transparent, but problem solved now. Thanks!