Potential fix ( Dark theme glitch without lightdm ) [Solved]

[SpongeBOB]

Hi,

When lightdm is removeed

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apt purge lightdm

it seem that some, all ? MX GUI , control panel application do not handle the dark mode -->


Cheers.

[SpongeBOB]

I've tried also by just disabling lightdm

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update-rc.d lightdm disable

same outcome.

(btw all the test were made a on fresh install MX-23.6)

[dolphin_oracle]

Whatever you’ve done it’s skipping processing of certain xsession setup files one of which sets some qt variables for themeing . Either that or you’ve removed the style plugins.

[SpongeBOB]

Thank you @dolphin_oracle ,

You made me doubt, and I retry it, but like I was saying

... btw all the test were made a on fresh install MX-23.6

So after have done

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update-rc.d lightdm disable
reboot

when the system restarted I do

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startxfce4

but maybe it need arguments to load the require for qt ?

Because indeed it's related to qt, because other programs made with qt do not display dark theme either.

Cheers.

[SpongeBOB]

I've check the variables env

and indeed there is a difference before and after have disable lightdm

missing variables

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QT_ACCESSIBILITY=1
GTK_MODULES=canberra-gtk-module:gail:atk-bridge
QT_PLATFORMTHEME=gtk2
QT_SCALE_FACTOR=1

XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_GREETER_DATA_DIR=/var/lib/lightdm/data/virtua
XAUTHORITY=/home/virtua/.Xauthority
GDM_LANG=en_US.UTF-8
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
PAPERSIZE=letter

with export I restored the first 4, but that didn't do the trick.

[SpongeBOB]

something else that bug without lightdm

when launching the GUI Bash Config XFCE freeze, no possibility to click to anything anymore. Passing on another tty and `reboot` works.

[dolphin_oracle]

Probably should start x with startx rather than startxfce.

[SpongeBOB]

Thanks @dolphin_oracle !

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startx

solve the problem with QT variables, and now the qt apps have access totheir dark mode/theme...

On the other hand the problem with Bash config remain.

[dolphin_oracle]

looks like bash-config gets hung up looking for information related to possibly the bash prompt setup. not sure why it gets hung when not run through a display manager, but it does. works ok when startx and then run from a terminal, so maybe something in the way X is starting isn't populating some environment variables located in .bashrc, but of course opening a terminal does...

[SpongeBOB]

.. works ok when startx and then run from a terminal, so maybe something in the way X is starting isn't populating some environment variables located in .bashrc, but of course opening a terminal does...

I've tried too and I confirm, thanks @dolphin_oracle