Bug 478898

Summary:	Visual corruption on panel when using adaptive or translucent opacity in portrait mode
Product:	[Plasma] plasmashell	Reporter:	qlum <qlumreg>
Component:	Panel	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	dennis, nate, niccolo.venerandi
Priority:	NOR	Keywords:	qt6
Version First Reported In:	5.91.0
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Screenshot of visual corruption: corruption1 corruption2

Description qlum 2023-12-22 21:01:08 UTC

SUMMARY
On plasma 6 beta 2, when using a translucent or adaptive panel opacity on a screen that is in portrait mode, I get visual corruption on the panel and widgets.
See the attached screenshot for details.

STEPS TO REPRODUCE
1. Have at least 1 screen in portrait mode
2. Possibly have at least 2 screens active (unsure)
3: have at least one panel on the screen in portrait mode
4: have some form of translucency enabled, be it adaptive or translucent

OBSERVED RESULT
Visual corruption on the panel and associated widget, such as but not limited to the application launcher.

SOFTWARE/OS VERSIONS
Kernel: 6.7-rc5
(available in About System)
KDE Plasma Version:  5.91.0
KDE Frameworks Version: 5.247.0
Qt Version: 6.7.0

ADDITIONAL INFORMATION
I run a setup where 2 gpu's are active at the same time but tested it with only displays connected to one of them.
I have 4 displays active at the same time but also tested it with just 2. 
This issue may have existed on plasma 5, I vaguely remember it there, but it does not seem to happen on the latest stable version

Comment 1 qlum 2023-12-23 09:07:22 UTC

I can also reproduce this issue on a different system using intel integrated graphics.
My main system uses a 7900xt + the igp of my 7800x3d (amd)

Comment 2 Dennis 2023-12-27 15:22:41 UTC

I can't reproduce this with:
- one laptop with built-in screen of 3840x2160
- Dell TB16 docking connected to external screen 3840x2160
- panels on both screens. 
- panel on external monitor with adaptive (and tried) translucent 

Can you attach the screenshot?

My specs:
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.91.90
KDE Frameworks Version: 5.248.0
Qt Version: 6.6.1
Kernel Version: 6.2.0-39-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15,3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: Dell Inc.
Product Name: XPS 13 9380

Comment 3 qlum 2023-12-27 15:25:31 UTC

Created attachment 164477 [details]
Screenshot of visual corruption:

Forgot to add the screenshot.

Comment 4 Dennis 2023-12-27 15:45:53 UTC

Created attachment 164478 [details]
corruption1

Comment 5 Dennis 2023-12-27 15:46:16 UTC

Created attachment 164479 [details]
corruption2

Comment 6 Dennis 2023-12-27 15:46:29 UTC

Ignore my previous comment, I missed it's in portrait mode. 

I can reproduce the issue somewhat, I see:
- very small task bar icons (see attachment). The launcher icon and system tray icons are the correct size.
- some corruption in the preview (see attachment)

My system:
- one laptop with built-in screen of 3840x2160
- Dell TB16 docking connected to external screen 3840x2160
- panel on external monitor with adaptive panel

Can you attach the screenshot?

My specs:
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.91.90
KDE Frameworks Version: 5.248.0
Qt Version: 6.6.1
Kernel Version: 6.2.0-39-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15,3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: Dell Inc.
Product Name: XPS 13 9380

Comment 7 Dennis 2023-12-27 16:00:55 UTC

Does not happen on neon-testing-20231219-0252.iso

Comment 8 Nate Graham 2024-01-11 17:37:40 UTC

FWIW Task Manager icons becoming too small is something else, not graphical corruption.

Comment 9 qlum 2024-01-13 13:13:32 UTC

Seems to be resolved on RC1 on my systems.

Comment 10 Nate Graham 2024-01-16 17:39:28 UTC

Great, thanks!