Bug 397621

Summary: Black stripe on the right side of the monitor.
Product: [Plasma] kwin Reporter: Unknown <null>
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal CC: bugseforuns, kde
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: When starting the wayland session the workspace appears like this
Lowering the resolution makes the black stripe disappear
After setting back the resolution to 1080p the default panel displays correctly but the wallpaper doesn't

Description Unknown 2018-08-19 14:08:06 UTC
Created attachment 114496 [details]
When starting the wayland session the workspace appears like this

Hi guys, i'm not sure if this is the right section or not, i'm having a hard time distinguishing the various kde components. (I'm not sure if it's a kwin/kscreen/plasma-workspace issue. 

After upgrading to KDE Plasma 5.13.4 on my Plasma (Wayland session) a black vertical stripe appeared on the right side of the monitor. It seems that the workspace has the wrong aspect Ratio (44 cm x 30 cm) but i can drag windows over it and they are visualized correctly. If i lower the resolution and set it back to 1920x1080 the default panel fills the monitor width how it's supposed to, but the wallpaper doesn't change size even if a select a different image.

I will attach some screenshots to better understand the issue.
Comment 1 Unknown 2018-08-19 14:09:01 UTC
Created attachment 114497 [details]
Lowering the resolution makes the black stripe disappear
Comment 2 Unknown 2018-08-19 14:09:43 UTC
Created attachment 114498 [details]
After setting back the resolution to 1080p the default panel displays correctly but the wallpaper doesn't
Comment 3 Unknown 2018-08-19 14:10:40 UTC
How to reproduce the issue:
I'm not sure. It only happens with this specific monitor (Dell s2415h) with my HP 23xi secondary monitor i don't have this issue.
Comment 4 Unknown 2018-08-19 15:30:29 UTC
I temporarily fixed the issue rollbacking to 5.13.3-1 the following packages:
-kscreen
-kwin
-plasma-wayland-session
-plasma-workspace

I will try to update them one by one to localize the problem as soon as i can.
Comment 5 Patrick Silva 2018-08-23 18:51:20 UTC
duplicate of bug 397628?
Comment 6 David Edmundson 2018-08-24 09:34:05 UTC
I think Ken's one is different as it's exactly 1/4 and we know he's scaling. That's a Qt issue I think we've sorted.

This can't be scaling, it's off by only a small amount. It does match the other report you linked though.

*** This bug has been marked as a duplicate of bug 397823 ***