After I log into Kubuntu 13.04 KDE on HP G72, two LVSD1 panels are detected. No external monitors are attached to the laptop. The LVSD panels are set side by side, the size of the desktop is 3200x900. I have to disable one of the panels in Display Manager every time I log in. This happens with and withot video.allow_duplicates=1 boot parameter (I don't know if this is relevant). dmesg: [ 2.900006] [Firmware Bug]: Duplicate ACPI video bus devices for the same VGA controller, please try module parameter "video.allow_duplicates=1"if the current driver doesn't work. Reproducible: Always Steps to Reproduce: 1. Log into KDE 2. 3. Content: ## kscreen-console bug right after login ## kscreen-console bug right after right display turned off ## lshw -C display ################################################# ## kscreen-console bug right after login: ################################################# START Config::current() took 65 milliseconds ========================xrandr --verbose========================== Screen 0: minimum 320 x 200, current 3200 x 900, maximum 32767 x 32767 LVDS2 connected 1600x900+0+0 (0x47) normal (normal left inverted right x axis y axis) 382mm x 215mm Identifier: 0x73 Timestamp: 16390 Subpixel: horizontal rgb Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones: CRTC: 0 CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff004ca3543300000000 00120103802615780a859599574f8f26 21505400000001010101010101010101 0101010101011c2a404c61841e303020 25007ed7100000190000000f00000000 00000000002efa067800000000fe0053 414d53554e470a2020202020000000fe 003137334b5430312d4b30310a20004b BACKLIGHT: 10 (0x0000000a) range: (0,10) Backlight: 10 (0x0000000a) range: (0,10) scaling mode: Full aspect supported: None Full Center Full aspect 1600x900 (0x47) 107.8MHz -HSync -VSync *current +preferred h: width 1600 start 1648 end 1680 total 1932 skew 0 clock 55.8KHz v: height 900 start 902 end 907 total 930 clock 60.0Hz 1440x900 (0x76) 106.5MHz -HSync +VSync h: width 1440 start 1520 end 1672 total 1904 skew 0 clock 55.9KHz v: height 900 start 903 end 909 total 934 clock 59.9Hz 1360x768 (0x77) 84.8MHz -HSync +VSync h: width 1360 start 1432 end 1568 total 1776 skew 0 clock 47.7KHz v: height 768 start 771 end 781 total 798 clock 59.8Hz 1360x768 (0x78) 72.0MHz +HSync -VSync h: width 1360 start 1408 end 1440 total 1520 skew 0 clock 47.4KHz v: height 768 start 771 end 781 total 790 clock 60.0Hz 1152x864 (0x79) 81.6MHz -HSync +VSync h: width 1152 start 1216 end 1336 total 1520 skew 0 clock 53.7KHz v: height 864 start 865 end 868 total 895 clock 60.0Hz 1024x768 (0x7a) 65.0MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz v: height 768 start 771 end 777 total 806 clock 60.0Hz 800x600 (0x7b) 40.0MHz +HSync +VSync h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz v: height 600 start 601 end 605 total 628 clock 60.3Hz 800x600 (0x7c) 36.0MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.2KHz v: height 600 start 601 end 603 total 625 clock 56.2Hz 640x480 (0x7d) 25.2MHz -HSync -VSync h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz v: height 480 start 490 end 492 total 525 clock 59.9Hz VGA2 disconnected (normal left inverted right x axis y axis) Identifier: 0x74 Timestamp: 16390 Subpixel: unknown Clones: CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: LVDS connected 1600x900+1600+0 (0x47) normal (normal left inverted right x axis y axis) 0mm x 0mm Identifier: 0x43 Timestamp: 30625 Subpixel: horizontal rgb Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones: CRTC: 2 CRTCs: 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: scaling mode: Full supported: None Full Center Full aspect 1600x900 (0x47) 107.8MHz -HSync -VSync *current +preferred h: width 1600 start 1648 end 1680 total 1932 skew 0 clock 55.8KHz v: height 900 start 902 end 907 total 930 clock 60.0Hz 1440x900 (0x48) 106.5MHz -HSync +VSync h: width 1440 start 1528 end 1672 total 1904 skew 0 clock 55.9KHz v: height 900 start 903 end 909 total 934 clock 59.9Hz 1280x854 (0x49) 89.2MHz -HSync +VSync h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 53.1KHz v: height 854 start 857 end 867 total 887 clock 59.9Hz 1280x800 (0x4a) 83.5MHz -HSync +VSync h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 49.7KHz v: height 800 start 803 end 809 total 831 clock 59.8Hz 1280x720 (0x4b) 74.5MHz -HSync +VSync h: width 1280 start 1344 end 1472 total 1664 skew 0 clock 44.8KHz v: height 720 start 723 end 728 total 748 clock 59.9Hz 1152x768 (0x4c) 71.8MHz -HSync +VSync h: width 1152 start 1216 end 1328 total 1504 skew 0 clock 47.7KHz v: height 768 start 771 end 781 total 798 clock 59.8Hz 1024x768 (0x4d) 63.5MHz -HSync +VSync h: width 1024 start 1072 end 1176 total 1328 skew 0 clock 47.8KHz v: height 768 start 771 end 775 total 798 clock 59.9Hz 800x600 (0x4e) 38.2MHz -HSync +VSync h: width 800 start 832 end 912 total 1024 skew 0 clock 37.4KHz v: height 600 start 603 end 607 total 624 clock 59.9Hz 848x480 (0x4f) 31.5MHz -HSync +VSync h: width 848 start 872 end 952 total 1056 skew 0 clock 29.8KHz v: height 480 start 483 end 493 total 500 clock 59.7Hz 720x480 (0x50) 26.8MHz -HSync +VSync h: width 720 start 744 end 808 total 896 skew 0 clock 29.9KHz v: height 480 start 483 end 493 total 500 clock 59.7Hz 640x480 (0x51) 23.8MHz -HSync +VSync h: width 640 start 664 end 720 total 800 skew 0 clock 29.7KHz v: height 480 start 483 end 487 total 500 clock 59.4Hz HDMI-0 disconnected (normal left inverted right x axis y axis) Identifier: 0x44 Timestamp: 30625 Subpixel: horizontal rgb Clones: CRTCs: 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: underscan vborder: 0 (0x00000000) range: (0,128) underscan hborder: 0 (0x00000000) range: (0,128) underscan: off supported: off on auto coherent: 1 (0x00000001) range: (0,1) VGA-0 disconnected (normal left inverted right x axis y axis) Identifier: 0x45 Timestamp: 30625 Subpixel: no subpixels Clones: CRTCs: 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: load detection: 1 (0x00000001) range: (0,1) 1600x900 (0x47) 107.8MHz h: width 1600 start 1648 end 1680 total 1932 skew 0 clock 55.8KHz v: height 900 start 902 end 907 total 930 clock 60.0Hz ========================Outputs=================================== Screen: maxSize: QSize(32767, 32767) minSize: QSize(320, 200) currentSize: QSize(3200, 900) ----------------------------------------------------- Id: 68 Name: "HDMI-0" Type: "Unknown" Connected: false ----------------------------------------------------- Id: 69 Name: "VGA-0" Type: "Unknown" Connected: false ----------------------------------------------------- Id: 115 Name: "LVDS2" Type: "Panel (Laptop)" Connected: true Enabled: true Primary: true Rotation: 1 Pos: QPoint(0,0) Size: QSize(1600, 900) Clones: true Mode: "71" Preferred Mode: "71" Preferred modes: ("71", "71") Modes: "124" "800x600" QSize(800, 600) 56.25 "125" "640x480" QSize(640, 480) 59.9405 "118" "1440x900" QSize(1440, 900) 59.8874 "119" "1360x768" QSize(1360, 768) 59.799 "71" "1600x900" QSize(1600, 900) 59.9969 "120" "1360x768" QSize(1360, 768) 59.96 "121" "1152x864" QSize(1152, 864) 59.9971 "122" "1024x768" QSize(1024, 768) 60.0038 "123" "800x600" QSize(800, 600) 60.3165 EDID Info: Device ID: "xrandr-unknown" Name: "" Vendor: "" Serial: "" EISA ID: "173KT01-K01" Hash: "458515465fba8deea601479ebd08a18d" Width: 38 Height: 21 Gamma: 2 Red: QQuaternion(scalar:1, vector:(0.599609, 0.339844, 0)) Green: QQuaternion(scalar:1, vector:(0.30957, 0.55957, 0)) Blue: QQuaternion(scalar:1, vector:(0.150391, 0.129883, 0)) White: QQuaternion(scalar:1, vector:(0.313477, 0.329102, 0)) ----------------------------------------------------- Id: 116 Name: "VGA2" Type: "Unknown" Connected: false ----------------------------------------------------- Id: 67 Name: "LVDS" Type: "Panel (Laptop)" Connected: true Enabled: true Primary: false Rotation: 1 Pos: QPoint(1600,0) Size: QSize(1600, 900) Clones: true Mode: "71" Preferred Mode: "71" Preferred modes: ("71", "71") Modes: "77" "1024x768" QSize(1024, 768) 59.9201 "78" "800x600" QSize(800, 600) 59.8614 "79" "848x480" QSize(848, 480) 59.6591 "80" "720x480" QSize(720, 480) 59.7098 "81" "640x480" QSize(640, 480) 59.375 "71" "1600x900" QSize(1600, 900) 59.9969 "72" "1440x900" QSize(1440, 900) 59.8874 "73" "1280x854" QSize(1280, 854) 59.8929 "74" "1280x800" QSize(1280, 800) 59.8103 "75" "1280x720" QSize(1280, 720) 59.8551 "76" "1152x768" QSize(1152, 768) 59.7821 EDID Info: Unavailable ========================Configurations============================ Configs in: "/home/mmarko/.kde/share/apps/kscreen/" Number of files: 2 "2fc66809e2b9d21ca703fbd0f3653914" "[ { "enabled" : true, "id" : "458515465fba8deea601479ebd08a18d", "metadata" : { "fullname" : "xrandr-unknown", "name" : "LVDS2" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 0, "y" : 0 }, "primary" : true, "rotation" : 1 }, { "enabled" : true, "id" : "LVDS", "metadata" : { "name" : "LVDS" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 1600, "y" : 0 }, "primary" : false, "rotation" : 1 } ]" "6099de01e6b64f004d67229588742b3c" "[ { "enabled" : true, "id" : "458515465fba8deea601479ebd08a18d", "metadata" : { "fullname" : "xrandr-unknown", "name" : "LVDS1" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 0, "y" : 0 }, "primary" : true, "rotation" : 1 }, { "enabled" : true, "id" : "LVDS-1", "metadata" : { "name" : "LVDS-1" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 1600, "y" : 0 }, "primary" : false, "rotation" : 1 } ]" ############################################################ ## kscreen-console bug right after right display turned off: ############################################################ START Config::current() took 69 milliseconds ========================xrandr --verbose========================== Screen 0: minimum 320 x 200, current 1600 x 900, maximum 32767 x 32767 LVDS2 connected 1600x900+0+0 (0x47) normal (normal left inverted right x axis y axis) 382mm x 215mm Identifier: 0x73 Timestamp: 16390 Subpixel: horizontal rgb Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones: CRTC: 0 CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff004ca3543300000000 00120103802615780a859599574f8f26 21505400000001010101010101010101 0101010101011c2a404c61841e303020 25007ed7100000190000000f00000000 00000000002efa067800000000fe0053 414d53554e470a2020202020000000fe 003137334b5430312d4b30310a20004b BACKLIGHT: 10 (0x0000000a) range: (0,10) Backlight: 10 (0x0000000a) range: (0,10) scaling mode: Full aspect supported: None Full Center Full aspect 1600x900 (0x47) 107.8MHz -HSync -VSync *current +preferred h: width 1600 start 1648 end 1680 total 1932 skew 0 clock 55.8KHz v: height 900 start 902 end 907 total 930 clock 60.0Hz 1440x900 (0x76) 106.5MHz -HSync +VSync h: width 1440 start 1520 end 1672 total 1904 skew 0 clock 55.9KHz v: height 900 start 903 end 909 total 934 clock 59.9Hz 1360x768 (0x77) 84.8MHz -HSync +VSync h: width 1360 start 1432 end 1568 total 1776 skew 0 clock 47.7KHz v: height 768 start 771 end 781 total 798 clock 59.8Hz 1360x768 (0x78) 72.0MHz +HSync -VSync h: width 1360 start 1408 end 1440 total 1520 skew 0 clock 47.4KHz v: height 768 start 771 end 781 total 790 clock 60.0Hz 1152x864 (0x79) 81.6MHz -HSync +VSync h: width 1152 start 1216 end 1336 total 1520 skew 0 clock 53.7KHz v: height 864 start 865 end 868 total 895 clock 60.0Hz 1024x768 (0x7a) 65.0MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz v: height 768 start 771 end 777 total 806 clock 60.0Hz 800x600 (0x7b) 40.0MHz +HSync +VSync h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz v: height 600 start 601 end 605 total 628 clock 60.3Hz 800x600 (0x7c) 36.0MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.2KHz v: height 600 start 601 end 603 total 625 clock 56.2Hz 640x480 (0x7d) 25.2MHz -HSync -VSync h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz v: height 480 start 490 end 492 total 525 clock 59.9Hz VGA2 disconnected (normal left inverted right x axis y axis) Identifier: 0x74 Timestamp: 16390 Subpixel: unknown Clones: CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: LVDS connected (normal left inverted right x axis y axis) Identifier: 0x43 Timestamp: 93794 Subpixel: horizontal rgb Clones: CRTCs: 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: scaling mode: Full supported: None Full Center Full aspect 1600x900 (0x47) 107.8MHz -HSync -VSync +preferred h: width 1600 start 1648 end 1680 total 1932 skew 0 clock 55.8KHz v: height 900 start 902 end 907 total 930 clock 60.0Hz 1440x900 (0x48) 106.5MHz -HSync +VSync h: width 1440 start 1528 end 1672 total 1904 skew 0 clock 55.9KHz v: height 900 start 903 end 909 total 934 clock 59.9Hz 1280x854 (0x49) 89.2MHz -HSync +VSync h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 53.1KHz v: height 854 start 857 end 867 total 887 clock 59.9Hz 1280x800 (0x4a) 83.5MHz -HSync +VSync h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 49.7KHz v: height 800 start 803 end 809 total 831 clock 59.8Hz 1280x720 (0x4b) 74.5MHz -HSync +VSync h: width 1280 start 1344 end 1472 total 1664 skew 0 clock 44.8KHz v: height 720 start 723 end 728 total 748 clock 59.9Hz 1152x768 (0x4c) 71.8MHz -HSync +VSync h: width 1152 start 1216 end 1328 total 1504 skew 0 clock 47.7KHz v: height 768 start 771 end 781 total 798 clock 59.8Hz 1024x768 (0x4d) 63.5MHz -HSync +VSync h: width 1024 start 1072 end 1176 total 1328 skew 0 clock 47.8KHz v: height 768 start 771 end 775 total 798 clock 59.9Hz 800x600 (0x4e) 38.2MHz -HSync +VSync h: width 800 start 832 end 912 total 1024 skew 0 clock 37.4KHz v: height 600 start 603 end 607 total 624 clock 59.9Hz 848x480 (0x4f) 31.5MHz -HSync +VSync h: width 848 start 872 end 952 total 1056 skew 0 clock 29.8KHz v: height 480 start 483 end 493 total 500 clock 59.7Hz 720x480 (0x50) 26.8MHz -HSync +VSync h: width 720 start 744 end 808 total 896 skew 0 clock 29.9KHz v: height 480 start 483 end 493 total 500 clock 59.7Hz 640x480 (0x51) 23.8MHz -HSync +VSync h: width 640 start 664 end 720 total 800 skew 0 clock 29.7KHz v: height 480 start 483 end 487 total 500 clock 59.4Hz HDMI-0 disconnected (normal left inverted right x axis y axis) Identifier: 0x44 Timestamp: 93794 Subpixel: horizontal rgb Clones: CRTCs: 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: underscan vborder: 0 (0x00000000) range: (0,128) underscan hborder: 0 (0x00000000) range: (0,128) underscan: off supported: off on auto coherent: 1 (0x00000001) range: (0,1) VGA-0 disconnected (normal left inverted right x axis y axis) Identifier: 0x45 Timestamp: 93794 Subpixel: no subpixels Clones: CRTCs: 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: load detection: 1 (0x00000001) range: (0,1) 1600x900 (0x47) 107.8MHz h: width 1600 start 1648 end 1680 total 1932 skew 0 clock 55.8KHz v: height 900 start 902 end 907 total 930 clock 60.0Hz ========================Outputs=================================== Screen: maxSize: QSize(32767, 32767) minSize: QSize(320, 200) currentSize: QSize(1600, 900) ----------------------------------------------------- Id: 68 Name: "HDMI-0" Type: "Unknown" Connected: false ----------------------------------------------------- Id: 69 Name: "VGA-0" Type: "Unknown" Connected: false ----------------------------------------------------- Id: 115 Name: "LVDS2" Type: "Panel (Laptop)" Connected: true Enabled: true Primary: true Rotation: 1 Pos: QPoint(0,0) Size: QSize(1600, 900) Clones: true Mode: "71" Preferred Mode: "71" Preferred modes: ("71", "71") Modes: "124" "800x600" QSize(800, 600) 56.25 "125" "640x480" QSize(640, 480) 59.9405 "118" "1440x900" QSize(1440, 900) 59.8874 "119" "1360x768" QSize(1360, 768) 59.799 "71" "1600x900" QSize(1600, 900) 59.9969 "120" "1360x768" QSize(1360, 768) 59.96 "121" "1152x864" QSize(1152, 864) 59.9971 "122" "1024x768" QSize(1024, 768) 60.0038 "123" "800x600" QSize(800, 600) 60.3165 EDID Info: Device ID: "xrandr-unknown" Name: "" Vendor: "" Serial: "" EISA ID: "173KT01-K01" Hash: "458515465fba8deea601479ebd08a18d" Width: 38 Height: 21 Gamma: 2 Red: QQuaternion(scalar:1, vector:(0.599609, 0.339844, 0)) Green: QQuaternion(scalar:1, vector:(0.30957, 0.55957, 0)) Blue: QQuaternion(scalar:1, vector:(0.150391, 0.129883, 0)) White: QQuaternion(scalar:1, vector:(0.313477, 0.329102, 0)) ----------------------------------------------------- Id: 116 Name: "VGA2" Type: "Unknown" Connected: false ----------------------------------------------------- Id: 67 Name: "LVDS" Type: "Panel (Laptop)" Connected: true Enabled: false Primary: false Rotation: 1 Pos: QPoint(0,0) Clones: true Mode: "" Preferred Mode: "71" Preferred modes: ("71", "71") Modes: "77" "1024x768" QSize(1024, 768) 59.9201 "78" "800x600" QSize(800, 600) 59.8614 "79" "848x480" QSize(848, 480) 59.6591 "80" "720x480" QSize(720, 480) 59.7098 "81" "640x480" QSize(640, 480) 59.375 "71" "1600x900" QSize(1600, 900) 59.9969 "72" "1440x900" QSize(1440, 900) 59.8874 "73" "1280x854" QSize(1280, 854) 59.8929 "74" "1280x800" QSize(1280, 800) 59.8103 "75" "1280x720" QSize(1280, 720) 59.8551 "76" "1152x768" QSize(1152, 768) 59.7821 EDID Info: Unavailable ========================Configurations============================ Configs in: "/home/mmarko/.kde/share/apps/kscreen/" Number of files: 2 "2fc66809e2b9d21ca703fbd0f3653914" "[ { "enabled" : true, "id" : "458515465fba8deea601479ebd08a18d", "metadata" : { "fullname" : "xrandr-unknown", "name" : "LVDS2" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 0, "y" : 0 }, "primary" : true, "rotation" : 1 }, { "enabled" : true, "id" : "LVDS", "metadata" : { "name" : "LVDS" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 1600, "y" : 0 }, "primary" : false, "rotation" : 1 } ]" "6099de01e6b64f004d67229588742b3c" "[ { "enabled" : true, "id" : "458515465fba8deea601479ebd08a18d", "metadata" : { "fullname" : "xrandr-unknown", "name" : "LVDS1" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 0, "y" : 0 }, "primary" : true, "rotation" : 1 }, { "enabled" : true, "id" : "LVDS-1", "metadata" : { "name" : "LVDS-1" }, "mode" : { "refresh" : 59.9969, "size" : { "height" : 900, "width" : 1600 } }, "pos" : { "x" : 1600, "y" : 0 }, "primary" : false, "rotation" : 1 } ]" ############################################################ ## lshw -C display ############################################################ *-display description: VGA compatible controller product: Park [Mobility Radeon HD 5430/5450/5470] vendor: Advanced Micro Devices [AMD] nee ATI physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=radeon latency=0 resources: irq:43 memory:a0000000-afffffff memory:c4400000-c441ffff ioport:3000(size=256) memory:c4440000-c445ffff *-display description: VGA compatible controller product: Core Processor Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:44 memory:c0000000-c03fffff memory:b0000000-bfffffff ioport:4050(size=8)
Created attachment 79844 [details] Display Configuration Screenshot
This is a bug in kernel and/or graphics driver. From the kernel message and lshw output it's clear that you have dual graphics setup - AMD and Intel, both connected to the same screen which makes kernel think that you have two screens. You can try disabling one of the cards in BIOS. That might solve the problem. Unfortunately there's nothing much we can do about this in KScreen. The only slightly confusing thing is why the outputs are called "LVDS1" and "LVDS-1" in the KCM when xrandr reports "LVDS" and "LVDS2", but that might simply be a consequence of having two embedded outputs.
I didn't see this behaviour before KUbuntu 13.04. There was allways only one monitor. The names have apparently changed when after I updraded the BIOS. It was the last thing I thought that could solve the problem, but it didn't. The screenshot with the names LVDS1 and LVDS-1 is from before the BIOS upgrade.
It can easily be a regression in kernel or graphics drivers that was introduced in the update that's available in 13.04. I suggest taking this to Launchpad where the issue can be triaged and assigned to appropriate developers or upstreamed to respective bug tracker.
(In reply to comment #4) > It can easily be a regression in kernel or graphics drivers that was > introduced in the update that's available in 13.04. I suggest taking this to > Launchpad where the issue can be triaged and assigned to appropriate > developers or upstreamed to respective bug tracker. I see. Tkanks.
The problem appears to be fixed after this update: --------- Version: 1.0.2.1-0ubuntu0.1 2013-12-03 18:06:51 UTC kscreen (1.0.2.1-0ubuntu0.1) saucy-proposed; urgency=low * New upstream release (LP: #1254125) * Update debian/watch * Bump b-dep on libkscreen-dev to (>= 1.0.2) -- Rohan Garg <email address hidden> Tue, 26 Nov 2013 18:01:34 +0100 --------- At logon KScreen restores the monitor configuration that I selected in the previous session. There are still two LVDS screens, but one of them is now disabled at logon.