xrandr shows two displays (LVDS1), but how can I use VGA1 only?
- by Tom Fishman
We're running Ubuntu 11 on this hardware: Foxconn R20-D2 Intel Atom D510 Intel NM10 Intel GMA 3150 Barebone
There is no integrated display (it is a barebone box). I connected an external VGA to it.
However xrandr shows two displays:
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*+
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 519mm x 324mm
1920x1200 60.0 +
1600x1200 60.0
1680x1050 60.0
1280x1024 76.0 75.0 72.0 60.0
1440x900 75.0 59.9
1152x864 75.0
1024x768 75.1 70.1 60.0*
832x624 74.6
800x600 72.2 75.0 60.3
640x480 72.8 75.0 66.7 60.0
720x400 70.1
But I don't have two displays. How can I get rid of LVDS1 and use only VGA1?
The direct result is that I'm seeing a 1024x768 resolution on my VGA display, because the OS is using "mirror" mode which uses the lower resolution of the two. Turning off the mirror is not a solution. I want to fix it.
Related logs:
...
[ 20.019] (II) intel(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
[ 20.019] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[ 20.019] (==) intel(0): RGB weight 888
[ 20.019] (==) intel(0): Default visual is TrueColor
[ 20.019] (II) intel(0): Integrated Graphics Chipset: Intel(R) Pineview G
[ 20.019] (--) intel(0): Chipset: "Pineview G"
[ 20.019] (**) intel(0): Relaxed fencing enabled
[ 20.019] (**) intel(0): Wait on SwapBuffers? enabled
[ 20.019] (**) intel(0): Triple buffering? enabled
[ 20.019] (**) intel(0): Framebuffer tiled
[ 20.019] (**) intel(0): Pixmaps tiled
[ 20.020] (**) intel(0): 3D buffers tiled
[ 20.020] (**) intel(0): SwapBuffers wait enabled
[ 20.020] (==) intel(0): video overlay key set to 0x101fe
[ 20.020] (II) intel(0): Output LVDS1 has no monitor section
[ 20.020] (II) intel(0): found backlight control interface /sys/class/backlight/intel_backlight
[ 20.080] (II) intel(0): Output VGA1 has no monitor section
[ 20.080] (II) intel(0): EDID for output LVDS1
[ 20.081] (II) intel(0): Not using default mode "320x240" (doublescan mode not supported)
[ 20.081] (II) intel(0): Not using default mode "400x300" (doublescan mode not supported)
[ 20.081] (II) intel(0): Not using default mode "400x300" (doublescan mode not supported)
[ 20.081] (II) intel(0): Not using default mode "512x384" (doublescan mode not supported)
...
[ 20.082] (II) intel(0): Not using default mode "960x600" (doublescan mode not supported)
[ 20.082] (II) intel(0): Printing probed modes for output LVDS1
[ 20.082] (II) intel(0): Modeline "1024x768"x60.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz)
[ 20.082] (II) intel(0): Modeline "800x600"x60.3 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz)
[ 20.082] (II) intel(0): Modeline "800x600"x56.2 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz)
[ 20.082] (II) intel(0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz)
[ 20.149] (II) intel(0): EDID for output VGA1
[ 20.149] (II) intel(0): Manufacturer: BNQ Model: 771b Serial#: 6595
[ 20.149] (II) intel(0): Year: 2008 Week: 16
[ 20.149] (II) intel(0): EDID Version: 1.3
[ 20.149] (II) intel(0): Analog Display Input, Input Voltage Level: 0.700/0.700 V
...
[ 20.152] (II) intel(0): Modeline "640x480"x60.0 25.20 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz)
[ 20.152] (II) intel(0): Modeline "720x400"x70.1 28.32 720 738 846 900 400 412 414 449 -hsync +vsync (31.5 kHz)
[ 20.152] (II) intel(0): Output LVDS1 connected
[ 20.152] (II) intel(0): Output VGA1 connected
[ 20.152] (II) intel(0): Using exact sizes for initial modes
[ 20.152] (II) intel(0): Output LVDS1 using initial mode 1024x768
[ 20.152] (II) intel(0): Output VGA1 using initial mode 1024x768
[ 20.152] (II) intel(0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated.
...