https://bugs.kde.org/show_bug.cgi?id=501622
--- Comment #3 from FK <[email protected]> --- Just an update. I tried the same display/cable/kwin version using a USB-C HDMI Adapter, and the OLED screen stays properly black even in SDR mode. Output: 2 DP-2 enabled connected priority 1 DisplayPort replication source:0 Modes: 14:3840x2160@60*! 15:4096x2160@120 16:4096x2160@120 17:4096x2160@100 18:4096x2160@60 19:4096x2160@60 20:4096x2160@50 21:4096x2160@30 22:4096x2160@30 23:4096x2160@25 24:4096x2160@24 25:4096x2160@24 26:3840x2160@120 27:3840x2160@120 28:3840x2160@100 29:3840x2160@60 30:3840x2160@60 31:3840x2160@50 32:3840x2160@30 33:3840x2160@30 34:3840x2160@25 35:3840x2160@24 36:3840x2160@24 37:2560x1440@120 38:1920x1200@60 39:1920x1080@120 40:1920x1080@120 41:1920x1080@100 42:1920x1080@60 43:1920x1080@60 44:1920x1080@60 45:1920x1080@50 46:1920x1080@30 47:1920x1080@30 48:1920x1080@25 49:1920x1080@24 50:1920x1080@24 51:1600x1200@60 52:1680x1050@60 53:1280x1024@60 54:1440x900@60 55:1280x800@60 56:1152x864@60 57:1280x720@60 58:1280x720@60 59:1280x720@50 60:1024x768@60 61:800x600@60 62:720x576@50 63:720x480@60 64:720x480@60 65:720x480@60 66:720x480@60 67:640x480@60 68:640x480@60 69:720x400@70 70:1600x1200@120 71:1280x1024@120 72:1024x768@120 73:2560x1600@60 74:2560x1600@120 75:1920x1200@120 76:1280x800@120 77:3200x1800@60 78:3200x1800@120 79:2880x1620@60 80:2880x1620@120 81:2560x1440@60 82:1600x900@60 83:1600x900@120 84:1368x768@60 85:1368x768@120 86:1280x720@120 Geometry: 0,0 3840x2160 Scale: 1 Rotation: 1 Overscan: 0 Vrr: incapable RgbRange: Automatic HDR: disabled Wide Color Gamut: disabled ICC profile: none Color profile source: sRGB Color power preference: prefer efficiency and performance Brightness control: supported, set to 100% and dimming to 100% Color resolution: 10 bits per color, range: [8; 16] bits per color Allow EDR: unsupported back with SDR on the HDMI 2.0 port, it's still lightly glowing: Output: 4 HDMI-A-1 enabled connected priority 1 HDMI replication source:0 Modes: 78:3840x2160@60*! 79:4096x2160@120 80:4096x2160@120 81:4096x2160@100 82:4096x2160@60 83:4096x2160@60 84:4096x2160@50 85:4096x2160@30 86:4096x2160@30 87:4096x2160@25 88:4096x2160@24 89:4096x2160@24 90:3840x2160@120 91:3840x2160@120 92:3840x2160@100 93:3840x2160@60 94:3840x2160@60 95:3840x2160@50 96:3840x2160@30 97:3840x2160@30 98:3840x2160@25 99:3840x2160@24 100:3840x2160@24 101:2560x1440@120 102:1920x1200@60 103:1920x1080@120 104:1920x1080@120 105:1920x1080@100 106:1920x1080@60 107:1920x1080@60 108:1920x1080@60 109:1920x1080@50 110:1920x1080@30 111:1920x1080@30 112:1920x1080@25 113:1920x1080@24 114:1920x1080@24 115:1600x1200@60 116:1680x1050@60 117:1280x1024@60 118:1440x900@60 119:1280x800@60 120:1152x864@60 121:1280x720@60 122:1280x720@60 123:1280x720@50 124:1024x768@60 125:800x600@60 126:720x576@50 127:720x480@60 128:720x480@60 129:720x480@60 130:720x480@60 131:640x480@60 132:640x480@60 133:720x400@70 134:1600x1200@120 135:1280x1024@120 136:1024x768@120 137:2560x1600@60 138:2560x1600@120 139:1920x1200@120 140:1280x800@120 141:3200x1800@60 142:3200x1800@120 143:2880x1620@60 144:2880x1620@120 145:2560x1440@60 146:1600x900@60 147:1600x900@120 148:1368x768@60 149:1368x768@120 150:1280x720@120 Geometry: 0,0 3840x2160 Scale: 1 Rotation: 1 Overscan: 0 Vrr: Automatic RgbRange: Automatic HDR: disabled Wide Color Gamut: disabled ICC profile: none Color profile source: sRGB Color power preference: prefer efficiency and performance Brightness control: supported, set to 100% and dimming to 100% Color resolution: 10 bits per color, range: [8; 16] bits per color Allow EDR: unsupported in HDR mode with HDMI there is no issue still. Is there anything else I could try or change? -- You are receiving this mail because: You are watching all bug changes.
