https://bugs.kde.org/show_bug.cgi?id=522735
--- Comment #10 from [email protected] --- Workaround found — and the bug is isolated to a single-GPU case (no cross-GPU copy involved) TL;DR — what fixed it for me My monitor is plugged into the NVIDIA card and KDE showed "no signal". I got a working picture by changing two things at once: 1. Forcing KWin to composite with OpenGL ES instead of desktop OpenGL: KWIN_COMPOSE=O2ES 2. Turning the monitor off HDR / off Wide Color Gamut (forcing plain SDR 8-bit): highDynamicRange:false, wideColorGamut:false, colorPowerTradeoff:PreferEfficiency With both applied, KWin goes from 48–64 GL errors per boot to zero, and I get a stable image on the NVIDIA output at 2560x1440@180Hz. Either change alone is not enough — you need both. -- You are receiving this mail because: You are watching all bug changes.
