| Summary: | Taskbar icons are moving to the left on hover with QT_QUICK_BACKEND=software | ||
|---|---|---|---|
| Product: | [Plasma] plasmashell | Reporter: | Balló György <ballogyor> |
| Component: | Panel | Assignee: | Plasma Bugs List <plasma-bugs> |
| Status: | RESOLVED UPSTREAM | ||
| Severity: | normal | CC: | johnkennedybango, karl, nate, niccolo.venerandi, qydwhotmail, vitorgermano8008, xaver.hugl |
| Priority: | NOR | Keywords: | qt6 |
| Version: | 6.0.1 | ||
| Target Milestone: | 1.0 | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| URL: | https://bugreports.qt.io/browse/QTBUG-123799 | ||
| See Also: | https://bugs.kde.org/show_bug.cgi?id=495911 | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: | Screenshot of the bug | ||
`QT_QUICK_BACKEND=software` isn't a supported way to run KDE software; there be dragons. But why? It was worked in Plasma 5. It was never supported; if it worked in Plasma 5 that was random chance. Please stop using it and then submit bug reports for the issues you encounter that make you want to use it. We want reports about bugs in our features, not reports about bugs in your workarounds for the bugs in our features. :) I’m experiencing the exact same problem, and I am *not* using QT_QUICK_BACKEND=software (as far as I’m aware). Whenever I hover over a button on the panel (either a taskbar icon or a different icon), it moves to the left, overlapping the application launcher. And here’s some more system information: Operating System: openSUSE Tumbleweed 20240514 KDE Plasma Version: 6.0.4 KDE Frameworks Version: 6.2.0 Qt Version: 6.7.0 Kernel Version: 6.8.9-1-default (64-bit) Graphics Platform: X11 Processors: 4 × Intel® Core™ i5-2500 CPU @ 3.30GHz Memory: 15.6 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 1060 3GB/PCIe/SSE2 Manufacturer: MSI Product Name: MS-7673 System Version: 1.0 Turns out that I *was* using software-based rendering after all. However, I did *not* manually enable it (e.g., using QT_QUICK_BACKEND=software). But for some reason (a crash?), Plasma decided to fall back to software-based rendering (rebooting didn’t help). I later got a notification about this. After reenabling OpenGL-based rendering, the problem with taskbar icons moving to the left disappeared. It's a Qt bug unfortunately: https://bugreports.qt.io/browse/QTBUG-123799 *** Bug 488072 has been marked as a duplicate of this bug. *** Still happens with Qt 6.8.0beta2. Still happens with Qt 6.8.0rc1. *** Bug 494912 has been marked as a duplicate of this bug. *** It seems that it was fixed finally in Qt 6.8.1, I cannot reproduce it anymore. |
Created attachment 166553 [details] Screenshot of the bug SUMMARY When I move the mouse over the icons on the taskbar, they move to the left. STEPS TO REPRODUCE 1. Set QT_QUICK_BACKEND=software environment variable in /etc/environment, then restart. 2. Start Plasma (Wayland) or Plasma (X11) session. 3. Move the mouse over the icons on the taskbar. OBSERVED RESULT Icons are moved to the left side. EXPECTED RESULT Icons should stay at their positions. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2