Bug 469988

Summary:	Flickering on panel after drop-down description box on panel item is selected.
Product:	[Plasma] plasmashell	Reporter:	Phoebe Harris <phoebe_harris>
Component:	Panel	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	minor	CC:	nate, niccolo.venerandi
Priority:	NOR
Version First Reported In:	5.27.5
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	6.2.0
Sentry Crash Report:
Attachments:	Screenshot of the problem

Description Phoebe Harris 2023-05-19 11:18:39 UTC

SUMMARY

After bringing up one of the drop-down information boxes on an item in the panel (for example, the text description of the date that appears when hovering over the date box), a faint white flicker will appear on that part of the panel. This seems to flicker only when the screen is changing. At first I thought it was when the mouse was moving, but it flickers constantly when an animated gif is on screen. 

STEPS TO REPRODUCE
1. Hover over date widget in panel
2. Move mouse away from date widget in panel

OBSERVED RESULT

There is a white flicker

EXPECTED RESULT

The panel looks as before

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9

ADDITIONAL INFORMATION
Wayland, integrated AMD graphics with mesa, kernel is 6.3.1-eupnea, from the Depthboot project.

Comment 1 Phoebe Harris 2023-05-19 11:25:10 UTC

Created attachment 159097 [details]
Screenshot of the problem

Apologies for poor screenshot quality, I couldn't replicate it in a screenshot so this is a screenshot of the screen recording (which I can't upload due to filesize)

Comment 2 Nate Graham 2023-05-19 20:14:35 UTC

How strange. Does it happen when you...
- Use a non-floating panel?
- Disable the "morphing popups effect in System Settings > Workspace Behavior > Desktop Effects
- Use the X11 session instead of Wayland?

Comment 3 Phoebe Harris 2023-05-21 13:46:40 UTC

(In reply to Nate Graham from comment #2)
> How strange. Does it happen when you...
> - Use a non-floating panel?
> - Disable the "morphing popups effect in System Settings > Workspace
> Behavior > Desktop Effects
> - Use the X11 session instead of Wayland?

Yep. I've managed to replicate it on non-floating panels, without, morphing popups, and on X11. 

It did take a little longer to replicate with a non-floating panel but I got there in the end.

Comment 4 Phoebe Harris 2023-05-22 11:20:15 UTC

I should also add that it stops flickering if I either place the cursor back on the part of the panel where the flickering it (which is also the part of the panel where the popup was), and also stops flickering if I switch window focus.

Comment 5 Nate Graham 2023-05-22 17:39:07 UTC

Ok, thanks.

Comment 6 Nate Graham 2024-08-28 19:05:29 UTC

This is fixed in Plasma 6.2.0