Bug 491402

Summary: On Wayland, when disabling the floating panel, it does not touch the bottom of the screen at certain fractional scale factors
Product: [Plasma] plasmashell Reporter: copilexp
Component: PanelAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: nate, niccolo.venerandi
Priority: NOR    
Version First Reported In: 6.0.5   
Target Milestone: 1.0   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed/Implemented In: 6.2.0
Sentry Crash Report:
Attachments: 2 full screenshots (one with the default breeze dark global theme)

Description copilexp 2024-08-07 18:00:11 UTC 
Created attachment 172377 [details]
2 full screenshots (one with the default breeze dark global theme)

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SUMMARY
The not "floating" normal panel does not fill up the bottom of the screen properly.

STEPS TO REPRODUCE
1. Enter "Edit Mode"
2. Uncheck "Floating"
3. Observe

OBSERVED RESULT
Small gap between the bottom of the display and the bottom of the panel

EXPECTED RESULT
No gap between the bottom of the display and the bottom of the panel

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2
Kernel Version: 6.9.10-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 12 × AMD Ryzen 5 5600H with Radeon Graphics
Memory: 14,5 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: LENOVO
Product Name: 82K2
System Version: IdeaPad Gaming 3 15ACH6

ADDITIONAL INFORMATION
This seems to be a bug afaik. Display server is X.Org X11. Only happens when the panel is positioned at the bottom of the screen.
Comment 1 copilexp 2024-08-07 18:19:06 UTC 
On another note, this seems to be a wider problem and not just related to the panel. I have seen this issue right now with the splash screen, a seemingly line at the bottom of the screen which the splash screen does NOT cover.
Comment 2 copilexp 2024-08-07 18:41:50 UTC 
+ It happens when i set the size of the panel to 48, on 46 there is no gap.
Comment 3 Nate Graham 2024-08-07 18:46:18 UTC 
What scale factor are you using? 100%, or something else?
Comment 4 copilexp 2024-08-07 18:52:17 UTC 
(In reply to Nate Graham from comment #3)
> What scale factor are you using? 100%, or something else?

This might very well be a scale factor issue, as I am using 118,75 on a 15inch laptop screen. However, the gap is gone on 125%. On wayland, the gap is on 120% and also disappears at 125%.
Comment 5 Nate Graham 2024-08-09 21:02:16 UTC 
Aha, so then this is fixed in 6.2.0, at least on Wayland. On X11 it's unfortunately nearly unfixable.