After Upgrade to Ubuntu 20.04 Lazarus binarys starting very slow
lazarus / 1-Linux

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tola2000 · 2020-04-30 09:51

Hello,

this week I installed the new Ubuntu 20.04 on my Lenovo T460s. Under
Ubuntu 18.04 and Lazarus IDE 1.8 I wrote some tools (with GUI), witch
are located as binaries  in my Home directory.
After the upgrade I observed the same Problem with every binary: After
the execution of the program (with double click of from cli) it takes
always about 30 sec. until the Program showed itself up on the screen.
BUT when I started the same program with sudo the GUI showed up
immediately.
In Both cases the program works normally after the starting phase.
Does anyone observe the same behavior? Is therr a cure?

Regards
tola

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tola2000 · 2020-05-02 20:31

I've found the solution. The Problem occurs in Ubuntu 19.10 as well!
Here the Link to the Solution:
https://askubuntu.com/questions/1184774/some-applications-on-
ubuntu-19-10-very-slow-to-start

And here in clear text:
You have to edit your .profile  in your  home-directory. Insert the
following Line:
Code: [Select]export QT_STYLE_OVERRIDE=cleanlooks
But I have not understand why!
 * Why have this line such an Impact?
 * Why did it wok despite I did not choose qt as LCLWidgetType?

Therefore i don't close the thread.

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marcov · 2020-05-02 21:18

Sounds like your desktop/windowmanager might use QT, and some of its
theming clashes with Lazarus somehow. Maybe it is relatively slow, and
lazarus does something too often.

But that is more a question for the team that makes that
windowmanager.