https://bugs.kde.org/show_bug.cgi?id=514237
Bug ID: 514237
Summary: Blur effect on background windows do not repaint
correctly when other windows overlap
Classification: Plasma
Product: kwin
Version First 6.5.4
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
The Blur background effect applied to windows do not react correctly to other
windows' content changes, leaving visible patches/rectangles that break the
consistency of the blur effect.
STEPS TO REPRODUCE
1. Open a window with a blurred background like Konole
2. Have another window below the aformentioned window update its content
3. Observe the blurred background not being repainted correctly
(see attachment)
OBSERVED RESULT
The window is only partially repainted, leaving a visible rectangle
delimitation that breaks the blur effect's smoothness
EXPECTED RESULT
The background blur should be smooth and consistent across the whole window.
SOFTWARE/OS VERSIONS
Linux: 6.18.2-arch2-1
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1
Wayland with PRIME setup
% lspci|grep VGA
00:02.0 VGA compatible controller: Intel Corporation Arrow Lake-S [Intel
Graphics] (rev 06)
02:00.0 VGA compatible controller: NVIDIA Corporation GB203M / GN22 [GeForce
RTX 5090 Max-Q / Mobile] (rev a1)
80:14.5 Non-VGA unclassified device: Intel Corporation Device 7f2f (rev 10)
% glxinfo | head -n15
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
GLX_ARB_context_flush_control, GLX_ARB_create_context,
GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_get_drawable_type, GLX_EXT_libglvnd, GLX_EXT_no_config_context,
GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating,
GLX_MESA_copy_sub_buffer, GLX_OML_swap_method, GLX_SGIS_multisample,
ADDITIONAL INFORMATION
All blur effects are affected, whether it be from the official Blur effect or
3rd party ones available e.g. on the ArchLinux AUR.
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