Bug 461636

Summary: Unable to render shadows, translucency
Product: [Plasma] kwin Reporter: ivan.pepelko
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: REPORTED ---    
Severity: normal CC: ahiemstra, ivan.pepelko, nate, vlad.zahorodnii
Priority: NOR    
Version First Reported In: 5.26.3   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: GTK screenshots

Description ivan.pepelko 2022-11-09 13:41:07 UTC
Created attachment 153626 [details]
GTK screenshots

STEPS TO REPRODUCE
Freshly installed system (arch, vanilla kernel, plasma, hybrid graphics intel+nvidia, only nvidia proprietary installed)

OBSERVED RESULT (only on X11)
- this notification appears in system tray on every login: 'Software Renderer In Use' (setting rendering backend explicitly to OpenGL does not seem to work)
- no shadows, transparency, blur on any apps
- GTK apps are showing bugged shadow (black square around context menus)
- Lock screen has black background (ui elements shown and working) regardless of selected wallpaper

EXPECTED RESULT
Above list of things to be working. These do work and render correctly under wayland. 

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.26.3
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.7
Kernel Version: 6.0.7-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 20 × 12th Gen Intel® Core™ i7-12700H
Memory: 31.1 GiB of RAM
Manufacturer: TUXEDO
Product Name: TUXEDO InfinityBook Pro Gen7 (MK1)
nvidia 520.56.06-9

ADDITIONAL INFORMATION
Comment 1 Vlad Zahorodnii 2022-11-10 07:34:33 UTC
Can you try setting QSG_RENDER_LOOP=basic environment variable? Does it help?
Comment 2 ivan.pepelko 2022-11-10 08:32:25 UTC
(In reply to Vlad Zahorodnii from comment #1)
> Can you try setting QSG_RENDER_LOOP=basic environment variable? Does it help?

Makes no difference.