| Summary: | Wallpaper thumbnails show a 1 or 2 px vertical white line in ultrawide display | ||
|---|---|---|---|
| Product: | [Plasma] plasmashell | Reporter: | Iyán M. V. <me> |
| Component: | Image & Slideshow wallpaper plugins | Assignee: | Plasma Bugs List <plasma-bugs-null> |
| Status: | RESOLVED FIXED | ||
| Severity: | minor | CC: | boredsquirrel, d_debnath, fanzhuyifan, jmb_tux, meven, musicalstrength27, nate, notmart, qydwhotmail |
| Priority: | NOR | Keywords: | qt6 |
| Version First Reported In: | 6.1.2 | ||
| Target Milestone: | 1.0 | ||
| Platform: | Other | ||
| OS: | Linux | ||
| Latest Commit: | https://invent.kde.org/frameworks/kdeclarative/-/commit/6f3609a63e37e9332d580fd53ee52bfec5a3927e | Version Fixed In: | Framework 6.6 |
| Sentry Crash Report: | |||
| Attachments: | White vertical line on thumbnails | ||
Thank you for your bug report! What is the resolution of your screen? I can't reproduce on my 1920x1080 monitor. I just realized that I also cannot reproduce on the built-in laptop's screen, which is 1920x1200 and I run with scale 125%. The screenshot was taken with an external ultrawide monitor with 3440x1440 (also running with scale 125%) *** Bug 481264 has been marked as a duplicate of this bug. *** (In reply to Iyán Méndez Veiga from comment #2) > I just realized that I also cannot reproduce on the built-in laptop's > screen, which is 1920x1200 and I run with scale 125%. The screenshot was > taken with an external ultrawide monitor with 3440x1440 (also running with > scale 125%) Seems like a rounding error of the size in the rendering due the the scale in QML. I am guessing the bug will be in WallpaperDelegate.qml in plasma-workspace, something similar to: https://invent.kde.org/plasma/plasma-workspace/-/commit/ff4fa345c5119000809c8bbb1357285cfd168a1e (In reply to Méven Car from comment #4) > (In reply to Iyán Méndez Veiga from comment #2) > > I just realized that I also cannot reproduce on the built-in laptop's > > screen, which is 1920x1200 and I run with scale 125%. The screenshot was > > taken with an external ultrawide monitor with 3440x1440 (also running with > > scale 125%) > > Seems like a rounding error of the size in the rendering due the the scale > in QML. > I am guessing the bug will be in WallpaperDelegate.qml in plasma-workspace, > something similar to: > https://invent.kde.org/plasma/plasma-workspace/-/commit/ > ff4fa345c5119000809c8bbb1357285cfd168a1e Or in Kdeclarative QPixmapItem::paint or QPixmapItem::updatePaintedRect that doesn't seem to take into account devicepixelratio or where there could be a mismatch between the two. (In reply to Méven Car from comment #5) > (In reply to Méven Car from comment #4) > > (In reply to Iyán Méndez Veiga from comment #2) > > > I just realized that I also cannot reproduce on the built-in laptop's > > > screen, which is 1920x1200 and I run with scale 125%. The screenshot was > > > taken with an external ultrawide monitor with 3440x1440 (also running with > > > scale 125%) > > > > Seems like a rounding error of the size in the rendering due the the scale > > in QML. > > I am guessing the bug will be in WallpaperDelegate.qml in plasma-workspace, > > something similar to: > > https://invent.kde.org/plasma/plasma-workspace/-/commit/ > > ff4fa345c5119000809c8bbb1357285cfd168a1e > > Or in Kdeclarative QPixmapItem::paint or QPixmapItem::updatePaintedRect that > doesn't seem to take into account devicepixelratio or where there could be a > mismatch between the two. Relevant prior work: https://phabricator.kde.org/D25685 A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kdeclarative/-/merge_requests/229 *** Bug 483612 has been marked as a duplicate of this bug. *** *** Bug 491862 has been marked as a duplicate of this bug. *** Git commit 6f3609a63e37e9332d580fd53ee52bfec5a3927e by Méven Car. Committed on 02/09/2024 at 13:04. Pushed by meven into branch 'master'. QPixmapItem: Adjust rendering to dpr positioning Push a bit further c3e6627e598ba25d2da87f5359aad194c122a6d9 M +14 -8 src/qmlcontrols/kquickcontrolsaddons/qpixmapitem.cpp https://invent.kde.org/frameworks/kdeclarative/-/commit/6f3609a63e37e9332d580fd53ee52bfec5a3927e The error still occurs, but only on the virtual machine in VirtualBox or VMware Workstation Pro. I am using CachOS with KDE. I have an NVIDIA RTX 4070 card. Resolution: 1920x1080. KDE Plasma Version: 6.2.4 KDE Frameworks Version: 6.9.0 Qt Version: 6.8.1 Session: Wayland Resolution: 1920x1080 |
Created attachment 165749 [details] White vertical line on thumbnails SUMMARY The thumbnails in the wallpaper settings show a thin white line on the left. STEPS TO REPRODUCE 1. Go to System Settings -> Wallpaper OBSERVED RESULT Wrong thumbnail EXPECTED RESULT Correct thumbnail as in Plasma 5.x SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.93.0 KDE Frameworks Version: 5.249.0 Qt Version: 6.7.0 Kernel Version: 6.7.4-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 8 × 11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz Memory: 15.3 GiB of RAM Graphics Processor: Mesa Intel® Xe Graphics Manufacturer: LENOVO Product Name: 20XYCTO1WW System Version: ThinkPad X1 Yoga Gen 6