View Issue Details

IDProjectCategoryView StatusLast Update
0037853LazarusIDEpublic2020-10-03 08:55
ReporterCyrax Assigned To 
Status newResolutionopen 
PlatformLinux x86_64OSArch 
Product Version2.1 (SVN) 
Summary0037853: Switching back to the Lazarus IDE from different program causes rapid blinking of the IDE windows as they are repainted.
DescriptionI don't remember if this was problem in earlier revisions of Lazarus IDE trunk, but it is now starting to get my nerves. Also focus one of the windows - if it is have one before - is lost during the repaint process.

If I disable "Show single button in the TaskBar" option (Options -> Environment -> Window -> "Show single button in the TaskBar") , then this bug vanishes.
Steps To Reproduce0. Start Lazarus IDE.
1. Make sure that "Show single button in the TaskBar" option (Options -> Environment -> Window -> "Show single button in the TaskBar") is checked.
2. Switch between the Lazarus IDE and other program.
TagsNo tags attached.
Fixed in Revision
WidgetsetGTK 2
Attached Files


related to 0021352 acknowledged Source Editor flashes every time a new tab is selected. 


Juha Manninen

2020-10-02 10:28

developer   ~0126031

What desktop system your Arch Linux has?
I don't see such blinking with my KDE system.
Can you please compare with older versions of Lazarus. Did the behavior change recently?


2020-10-02 12:17

reporter   ~0126033

Last edited: 2020-10-02 12:29

View 2 revisions

I use LXDE desktop environment.

I see if I can get older version/go back revisions to check if it normal or not.

EDIT : Tested with release version of Lazarus (2.0.10), the blinking and lost focus of active window is there.

Juha Manninen

2020-10-03 08:55

developer   ~0126047

LXDE is mentioned also in related 0021352. It is about TabControl.

Issue History

Date Modified Username Field Change
2020-10-02 01:00 Cyrax New Issue
2020-10-02 10:28 Juha Manninen Note Added: 0126031
2020-10-02 12:17 Cyrax Note Added: 0126033
2020-10-02 12:29 Cyrax Note Edited: 0126033 View Revisions
2020-10-03 08:53 Juha Manninen Relationship added related to 0021352
2020-10-03 08:55 Juha Manninen Note Added: 0126047