Same code different GUI?

Mucip

Hi,
What you mean? Which style?

Do you mean KDE Plazma Style?

SGaist

Hi,

Likely yes.
Start your application with the QT_DEBUG_PLUGINS environment variable set to 1.
You will be able to see which plugins get loaded and compare between both systems.

Mucip

I forgot. I did not say that I run Debain12 on single board computer. RockPi ?!
Is the reason be this?

SGaist

Board or full computer should not make a difference in that case. You likely have two different versions of KDE and Plasma running which may be using a different style hence the suggestion to check which one is being loaded.

Mucip

OK. I see many changes on both loading things. And very difficult to see reason for me?!

But I can not add both txt files here?!

But I see in first lines:
Debian12 uses;
QVncIntegrationPlugin
QXcbIntegrationPlugin
QVkKhrDisplayIntegrationPlugin

Debian13 uses;
QXcbIntegrationPlugin
QLinuxFbIntegrationPlugin
QOffscreenIntegrationPlugin

Mucip

Or should I transfer to basic desktop something like xfce?

Mucip

I started QT_QPA_PLATFORM=eglfs mode I mean without Desktop but nothing changed?!

Mucip

Any suggestion about my problem?

SGaist

Can you describe your setup with more precision ?
Which exact version of Qt are you using on each system ?
Which exact version of KDE are you using on each ?
Which style does get loaded and used ?
How are you starting your application ?

Mucip

Dear @SGaist ,
I wrote program in QtCreator 6.11.2 in Debian 13.
I copy code to Debain12. Because RockPi use Debian 12. And I use qmak6 to compile in Debian12.
I run compiled program from CLI in Debian12.

Debian 12KDE:

Debian 13 KDE:

I use Breeze Dark on both system.

Regards,
Mucip:)