QT_QPA_PLATFORMTHEME cannot be set to qt5ct

Deleted member 67862 · Mar 26, 2022

Greetings,

For several months I've tried to get qt5ct to be configured correctly by having QT_QPA_PLATFORMTHEME set to qt5ct. It seems to not work through any of the methods:

Putting QT_QPA_PLATFORMTHEME (variable) in /etc/profile
Putting the variable in .tcshrc (I use tcshrc)
Putting the variable in csh, tcsh, and sh rc's (translated to what they use to set environment variables of course)
Putting the variable in ~/.profile
Adding sh -c "QT_QPA_PLATFORMTHEME=qt5ct" to Xfce startup

Some of the ones above only work for qt programs launched from the terminal. Other ones don't work at all. I've circumvented this issue entirely by using icewm because it has an "env" file where you can add this environment variable. However, I'm using Xfce and can't rely on that file anymore. So I'm either glued to using icewm or just not having qt5 programs adhere at all to my gtk theme. Does anyone happen to know a solution?

Alexander88207 · Mar 26, 2022

In XFCE i do have put

Code:

QT_QPA_PLATFORMTHEME=qt5ct;      export QT_QPA_PLATFORMTHEME

in ~/.profile and it works for me.

Alexander88207 · Mar 26, 2022

If everything seems to fail (Which is kind of weird) for you can do modify the xfce session file /usr/local/share/xsessions/xfce.desktop
which is a dirty way but this should work then.

Note that this file can be overwritten by updates or re-installation of the xfce4-session package.

Alexander88207 · Mar 26, 2022

hunter0one said:
I'm using Xfce and can't rely on that file anymore.

You can. The command that you should write in that file should be startxfce4 then.

Deleted member 67862 · Mar 26, 2022

Alexander88207 said:
In XFCE i do have put

Code:

QT_QPA_PLATFORMTHEME=qt5ct; export QT_QPA_PLATFORMTHEME

in ~/.profile and it works for me.

Weird, I have this exact same thing but it's not working. Im using xdm to launch xfce if that matters.

Bash:

....

EDITOR=ee;       export EDITOR
PAGER=less;      export PAGER

# set ENV to a file invoked each time sh is started for interactive use.
ENV=$HOME/.shrc; export ENV

# Set qt5 to use qt5ct
QT_QPA_PLATFORMTHEME=qt5ct; export QT_QPA_PLATFORMTHEME

Deleted member 67862 · Mar 26, 2022

Alexander88207 said:
You can. The command that you should write in that file should be startxfce4 then.

You must be thinking of .xsession / .xinitrc. Icewm has a special ~/.icewm/env file you can make which will set the environment variable for icewm itself.

Alexander88207 · Mar 26, 2022

hunter0one said:
Weird, I have this exact same thing but it's not working. Im using xdm to launch xfce if that matters.

Bash:

.... EDITOR=ee; export EDITOR PAGER=less; export PAGER # set ENV to a file invoked each time sh is started for interactive use. ENV=$HOME/.shrc; export ENV # Set qt5 to use qt5ct QT_QPA_PLATFORMTHEME=qt5ct; export QT_QPA_PLATFORMTHEME

Maybe its related to the display manager?

What happens if you try lightdm?

covacat · Mar 26, 2022

export it in .xsession if you use xdm
check running process env with ps -ewww

Deleted member 67862 · Mar 26, 2022

Alexander88207 said:
Maybe its related to the display manager?

What happens if you try lightdm?

Lightdm gives me a black screen.

covacat said:
export it in .xsession if you use xdm
check running process env with ps -ewww

It's just showing tcsh really:

Code:

hunter@mybsdpc:~ % env ps -ewww
  PID TT  STAT    TIME COMMAND
50025 v1  I+   0:00.01  -tcsh (tcsh)
55939  0  Ss   0:00.05  -tcsh (tcsh)
56800  0  R+   0:00.00  ps -ewww

My .xsession is now:

Code:

QT_QPA_PLATFORMTHEME=qt5ct; export QT_QPA_PLATFORMTHEME
startxfce4

But no difference

Alexander88207 · Mar 26, 2022

hunter0one said:
Lightdm gives me a black screen.

When starting lightdm or when login to the xfce session?

Deleted member 67862 · Mar 26, 2022

Alexander88207 said:
When starting lightdm or when login to the xfce session?

When starting lightdm. It did not have an entry in /etc/ttys so I added lightdm_enable=YES in rc.conf and got a black screen when starting up.

Alexander88207 · Mar 26, 2022

hunter0one said:
When starting lightdm. It did not have an entry in /etc/ttys so I added lightdm_enable=YES in rc.conf and got a black screen when starting up.

Do you have lightdm-gtk-greeter installed?

covacat · Mar 26, 2022

use ps -ewwwx to show background processes

Deleted member 67862 · Mar 26, 2022

Alexander88207 said:
Do you have lightdm-gtk-greeter installed?

Yes

covacat said:
use ps -ewwwx to show background processes

I did:

Code:

hunter@mybsdpc:~ % env ps -ewww
  PID TT  STAT    TIME COMMAND
50025 v1  I+   0:00.01  -tcsh (tcsh)
55939  0  Ss   0:00.05  -tcsh (tcsh)
56800  0  R+   0:00.00  ps -ewww

covacat · Mar 26, 2022

weird no env is shown

Code:

titus@hpbsd:~ % ps -ewww -p $$
  PID TT  STAT    TIME COMMAND
29413  1  Ss   0:00.02 USER=titus LOGNAME=titus HOME=/home/titus MAIL=/var/mail/titus PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/home/titus/bin TERM=xterm-256color BLOCKSIZE=K MM_CHARSET=UTF-8 LANG=C.UTF-8 SHELL=/bin/tcsh SSH_CLIENT=10.1.1.1 15844 22 SSH_CONNECTION=10.1.1.1 15844 10.1.1.177 22 SSH_TTY=/dev/pts/1 -tcsh (tcsh)
titus@hpbsd:~ %

Deleted member 67862 · Mar 26, 2022

env shows a bunch of variables, but they just arent showing up in ps. Everything is normal in xfce terminal. Now I don't understand why I don't see all that in ps

covacat · Mar 26, 2022

do you have any 'hardening' stuff in sysctl.conf ?

Deleted member 67862 · Mar 26, 2022

covacat said:
do you have any 'hardening' stuff in sysctl.conf ?

Actually I do, I picked all the hardening options as per Robonuggie suggested.

security.bsd.see_other_uids=0
security.bsd.see_other_gids=0
security.bsd.see_jail_proc=0
security.bsd.unprivileged_read_msgbuf=0
security.bsd.unprivileged_proc_debug=0
kern.randompid=1

covacat · Mar 26, 2022

sysctl security.bsd.unprivileged_proc_debug=1
turn this to 1

Deleted member 67862 · Mar 26, 2022

covacat said:
sysctl security.bsd.unprivileged_proc_debug=1
turn this to 1

ps now shows a lot but still nothing about QT_QPA_PLATFORMTHEME.

T-Daemon · Mar 27, 2022

Try copy /usr/local/etc/xdg/xfce4/xinitrc to ~/.config/xfce4/ and export the environment variable there.

Deleted member 67862 · Mar 27, 2022

T-Daemon said:
Try copy /usr/local/etc/xdg/xfce4/xinitrc to ~/.config/xfce4/ and export the environment variable there.

Hey that did it. Thanks!

bsduck · Apr 1, 2022

hunter0one said:
Im using xdm to launch xfce if that matters.

It does. Some time ago I noticed XDM doesn't care about ~/.profile if you don't tell it to.

I recommend you to add . ~/.profile to your ~/.xsession, it may save you other issues.

QT_QPA_PLATFORMTHEME cannot be set to qt5ct

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