https://bugs.kde.org/show_bug.cgi?id=521773
Bug ID: 521773
Summary: There is a visual rendering artifact (off-by-one pixel
rounding issue) on the microphone slider line in the
Audio Volume widget. The horizontal line breaks and
shifts vertically by a few pixels, but ONLY when the
microphone is muted (disabled state) AND f
Classification: Applications
Product: Discover
Version First 6.7.80
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: KDE Linux backend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
STEPS TO REPRODUCE
1. Set display scaling to a fractional value (e.g., 125% / 1.25x) in System
Settings.
2. Open the Audio Volume widget from the System Tray.
3. Set the Microphone volume to 0%.
4. Click the "Mute" button next to the Microphone to disable it.
OBSERVED RESULT
The muted (grey) slider line splits into two pieces and looks broken/zigzagged
near the center.
EXPECTED RESULT
The slider line should remain perfectly straight and solid, regardless of the
muted/unmuted state or fractional scaling factor.
ADDITIONAL INFORMATION
- If you UNMUTE the microphone (even at 0%), the line instantly becomes
perfectly straight again (active state rendering handles it correctly).
- If you change the volume to 1% while muted, the line also fixes itself.
- This appears to be a subpixel rounding bug in QML/Qt rendering when
calculating coordinates and geometry for the disabled/muted state of the slider
component under fractional scaling.
SOFTWARE/OS VERSIONS
OS: Fedora Linux 44
KDE Plasma Version: 6.7.0
KDE Frameworks Version: 6.x
Qt Version: 6.x
Kernel: 7.0.12-cachyos1.fc44.x86_64 (64-bit)
Graphics Platform: Wayland
Display Display (LEN9153): 1920x1200 @ 1.25x (16", 165 Hz)
WM Theme: Breeze
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