我有一个非常困难的问题。
但我不知道已经三个星期没有找到解决这个问题的方法。
现在测试操作系统（ubuntu 14.04，ubuntu 12.10，ubuntu 12.04）同样的问题。
物理连接 VGA 和 LVDS。但如果连接了 VGA，LVDS 屏幕就会关闭。
我不知道为什么会出现这个问题。
有人帮忙
中央处理器 ：
$ cat /proc/cpuinfo
Intel(R) Atom(TM) CPU N270 @ 1.60GHz
操作系統：
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.10
DISTRIB_CODENAME=quantal
DISTRIB_DESCRIPTION="Ubuntu 12.10"
显卡：$ lspci
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
BIOS VGA 设置：
- On-chip Frame buffer Size : 8MB
- DVMT Mode : BOTH
- DVMT/FIXED Memory Size 128MB
- Boot Display CRT+LCD(24bit)
- Panel Number 800x600 24/1
X 信息： 1. 版本：
X.Org X Server 1.13.0
Release Date: 2012-09-05
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.2.0-54-generic i686 Ubuntu
Current Operating System: Linux lotto-desktop 3.5.0-51-generic #76-Ubuntu SMP Thu May 15 21:19:44 UTC 2014 i686
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.5.0-51-generic root=UUID=01ccefaf-b010-4a6b-a11c-717305a70dc0 ro quiet splash vt.handoff=7
Build Date: 05 November 2013 03:14:52PM
2. Configure :
$ cat /etc/X11/xorg.conf
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/share/fonts/X11/cyrillic"
FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath "built-ins"
EndSection
Section "Module"
Load "glx"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Device"
### Available Driver options are:-
### Values: : integer, : float, : "True"/"False",
### : "String", : " Hz/kHz/MHz",
### : "%"
### [arg]: arg optional
#Option "SWcursor" # []
#Option "kmsdev" #
#Option "ShadowFB" # []
Identifier "Card0"
Driver "modesetting"
BusID "PCI:0:2:0"
EndSection
Section "Device"
### Available Driver options are:-
### Values: : integer, : float, : "True"/"False",
### : "String", : " Hz/kHz/MHz",
### : "%"
### [arg]: arg optional
#Option "NoAccel" # []
#Option "AccelMethod" #
#Option "Backlight" #
#Option "DRI" # []
#Option "ColorKey" #
#Option "VideoKey" #
#Option "Tiling" # []
#Option "LinearFramebuffer" # []
#Option "SwapbuffersWait" # []
#Option "XvPreferOverlay" # []
#Option "HotPlug" # []
#Option "RelaxedFencing" # []
#Option "XvMC" # []
#Option "Throttle" # []
#Option "ZaphodHeads" #
#Option "DelayedFlush" # []
#Option "TearFree" # []
#Option "PerCrtcPixmaps" # []
#Option "FallbackDebug" # []
#Option "DebugFlushBatches" # []
#Option "DebugFlushCaches" # []
#Option "DebugWait" # []
#Option "BufferCache" # []
#Option "TripleBuffer" # []
Identifier "Card1"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
Section "Device"
### Available Driver options are:-
### Values: : integer, : float, : "True"/"False",
### : "String", : " Hz/kHz/MHz",
### : "%"
### [arg]: arg optional
#Option "NoAccel" # []
#Option "AccelMethod" #
#Option "Backlight" #
#Option "DRI" # []
#Option "ColorKey" #
#Option "VideoKey" #
#Option "Tiling" # []
#Option "LinearFramebuffer" # []
#Option "SwapbuffersWait" # []
#Option "XvPreferOverlay" # []
#Option "HotPlug" # []
#Option "RelaxedFencing" # []
#Option "XvMC" # []
#Option "Throttle" # []
#Option "ZaphodHeads" #
#Option "DelayedFlush" # []
#Option "TearFree" # []
#Option "PerCrtcPixmaps" # []
#Option "FallbackDebug" # []
#Option "DebugFlushBatches" # []
#Option "DebugFlushCaches" # []
#Option "DebugWait" # []
#Option "BufferCache" # []
#Option "TripleBuffer" # []
Identifier "Card2"
Driver "intel"
BusID "PCI:0:2:1"
EndSection
Section "Device"
### Available Driver options are:-
### Values: : integer, : float, : "True"/"False",
### : "String", : " Hz/kHz/MHz",
### : "%"
### [arg]: arg optional
#Option "ShadowFB" # []
#Option "Rotate" #
#Option "fbdev" #
#Option "debug" # []
Identifier "Card3"
Driver "fbdev"
BusID "PCI:0:2:0"
EndSection
Section "Device"
### Available Driver options are:-
### Values: : integer, : float, : "True"/"False",
### : "String", : " Hz/kHz/MHz",
### : "%"
### [arg]: arg optional
#Option "ShadowFB" # []
#Option "DefaultRefresh" # []
#Option "ModeSetClearScreen" # []
Identifier "Card4"
Driver "vesa"
BusID "PCI:0:2:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card1"
Monitor "Monitor0"
Defaultdepth 24
SubSection "Display"
Modes "800x600"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "Monitor1"
Defaultdepth 24
SubSection "Display"
Modes "800x600"
EndSubSection
EndSection
3. xrandr output : LVDS1 connected, VGA1 non-connected
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 800 x 600, maximum 4096 x 4096
VGA1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x41
Timestamp: 1940078
Subpixel: unknown
Clones: LVDS1
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
LVDS1 connected 800x600+0+0 (0x45) normal (normal left inverted right x axis y axis) 0mm x 0mm
Identifier: 0x42
Timestamp: 1940078
Subpixel: horizontal rgb
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones: VGA1
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:
800x600 (0x45) 40.0MHz -HSync -VSync *current +preferred
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 (0x46) 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 (0x47) 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 (0x48) 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
TV1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x43
Timestamp: 1940078
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:
bottom margin: 37 (0x00000025) range: (0,100)
right margin: 46 (0x0000002e) range: (0,100)
top margin: 36 (0x00000024) range: (0,100)
left margin: 54 (0x00000036) range: (0,100)
mode: NTSC-M
supported: NTSC-M NTSC-443 NTSC-J PAL-M
PAL-N PAL 480p 576p
720p@60Hz 720p@50Hz 1080i@50Hz 1080i@60Hz
4. xrandr output : Now physical LVDS1 connected, VGA1 connected
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 4096 x 4096
VGA1 connected 1920x1080+0+0 (0x45) normal (normal left inverted right x axis y axis) 477mm x 268mm
Identifier: 0x41
Timestamp: 9242568
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones: LVDS1
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:
00ffffffffffff004c2e9a303e593f1e
2f1401030e351c782a3581a656489a24
1250542308008100814081809500a940
b30001010101023a801871382d40582c
4500dd0c1100001e792e401062842030
70981300bbf91000001c000000fd0038
4b1e5f12000a202020202020000000fc
004c4344204d4f4e49544f520a200068
1920x1080 (0x45) 148.5MHz +HSync +VSync *current +preferred
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.5KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.0Hz
1600x1200 (0x46) 162.0MHz +HSync +VSync
h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 75.0KHz
v: height 1200 start 1201 end 1204 total 1250 clock 60.0Hz
1680x1050 (0x47) 146.2MHz -HSync +VSync
h: width 1680 start 1784 end 1960 total 2240 skew 0 clock 65.3KHz
v: height 1050 start 1053 end 1059 total 1089 clock 60.0Hz
1600x900 (0x48) 119.0MHz -HSync +VSync
h: width 1600 start 1712 end 1864 total 2128 skew 0 clock 55.9KHz
v: height 900 start 901 end 904 total 932 clock 60.0Hz
1280x1024 (0x49) 108.0MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 64.0KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.0Hz
1440x900 (0x4a) 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
1280x960 (0x4b) 108.0MHz +HSync +VSync
h: width 1280 start 1376 end 1488 total 1800 skew 0 clock 60.0KHz
v: height 960 start 961 end 964 total 1000 clock 60.0Hz
1280x800 (0x4c) 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
1024x768 (0x4d) 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 (0x4e) 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 (0x4f) 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 (0x50) 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 60.0Hz
LVDS1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x42
Timestamp: 9242568
Subpixel: horizontal rgb
Clones: VGA1
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
TV1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x43
Timestamp: 9242568
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:
bottom margin: 37 (0x00000025) range: (0,100)
right margin: 46 (0x0000002e) range: (0,100)
top margin: 36 (0x00000024) range: (0,100)
left margin: 54 (0x00000036) range: (0,100)
mode: NTSC-M
supported: NTSC-M NTSC-443 NTSC-J PAL-M
PAL-N PAL 480p 576p
720p@60Hz 720p@50Hz 1080i@50Hz 1080i@60Hz
5. Log :
I think this line very strange. Why disconnected LVDS?
[ 10.813] (II) intel(0): Output VGA1 connected
[ 10.813] (II) intel(0): Output LVDS1 disconnected
[ 10.813] (II) intel(0): Output TV1 disconnected
If you need to all log. I will post that. that's very long.