*** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** SUMMARY On older video card hardware (i915) there is some broken rendering with OpenGL composting. In journalctl I see the following information: Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to build graphics pipeline state Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to build graphics pipeline state Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to build graphics pipeline state Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to build graphics pipeline state Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to build graphics pipeline state Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to build graphics pipeline state Jun 26 13:12:39 mrichan plasmashell[1424]: Failed to link shader program: error: Exceeded max ALU instructions (106/64) Jun 26 13:15:13 mrichan systemsettings[1774]: Failed to link shader program: error: Exceeded max ALU instructions (77/64) Jun 26 13:15:13 mrichan systemsettings[1774]: Failed to build graphics pipeline state Jun 26 13:15:13 mrichan systemsettings[1774]: Failed to link shader program: error: Exceeded max ALU instructions (77/64) Jun 26 13:15:13 mrichan systemsettings[1774]: Failed to build graphics pipeline state STEPS TO REPRODUCE 1. Install KDE 6.1.1 (or older version) on hardware with video card i915 2. Check the logs OBSERVED RESULT Issues with graphics rendering. Also separate issue with login screen SDDM without text. I have created separate bug report: https://github.com/sddm/sddm/issues/1958 EXPECTED RESULT No rendering issues SOFTWARE/OS VERSIONS Linux/KDE Plasma: Gentoo (available in About System) KDE Plasma Version: 6.1.1 KDE Frameworks Version: 6.3.0 Qt Version: 6.7.1 ADDITIONAL INFORMATION
Please attach the output of wayland-info. If KWin falls back to llvmpipe or QPainter, apps should be doing the same
(In reply to Zamundaaa from comment #1) > Please attach the output of wayland-info. If KWin falls back to llvmpipe or > QPainter, apps should be doing the same Currently i am using X11 and not wayland. wayland-info failed to create display: No such file or directory
ah. Not sure we can do anything about this then; maybe Qt needs a similar check as KWin now has
Yeah.
Is this reported to QT?
I reported this to Qt developers here: https://bugreports.qt.io/browse/QTBUG-126962 The workaround is to specify the environment variable 'QT_QUICK_BACKEND=software' manually. Unfortunately it triggers another bug that taskbar icons are moving to the left: https://bugs.kde.org/show_bug.cgi?id=482669 Which is also reported to Qt developers: https://bugreports.qt.io/browse/QTBUG-123799 Even if these issues would be solved, the Wayland session have one more bug: it crashes all the time when I press Alt-Tab https://bugs.kde.org/show_bug.cgi?id=482663 And the mouse pointer is also broken, not rendered correctly under Wayland with the QPainter backend. So there there are multiple things need to be fixed to make it possible to use KDE Plasma on this hardware.