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I have a monitor Acer H233H and want to set resolution of 1920x1080. I googled it and found that it's necessary to use /etc/X11/xorg.conf. I created this file using sudo Xorg -configure, copied it to /etc/X11/ and restarted lightdm, but then lightdm restarts in cycle.

My xorg.conf:

Section "ServerLayout"
Identifier     "X.org Configured"
Screen      0  "Screen0" 0 0
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     "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"
Identifier  "Card0"
Driver      "nvidia"
BusID       "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device     "Card0"
Monitor    "Monitor0"
SubSection "Display"
    Viewport   0 0
    Depth     1
EndSubSection
SubSection "Display"
    Viewport   0 0
    Depth     4
EndSubSection
SubSection "Display"
    Viewport   0 0
    Depth     8
EndSubSection
SubSection "Display"
    Viewport   0 0
    Depth     15
EndSubSection
SubSection "Display"
    Viewport   0 0
    Depth     16
EndSubSection
SubSection "Display"
    Viewport   0 0
    Depth     24
EndSubSection
EndSection

UPD: I tried https://askubuntu.com/a/617318/404225. My /usr/share/X11/xorg.conf.d/10-monitor.conf is now:

Section "Monitor"
Identifier "Monitor0"
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
EndSection
Section "Screen"
Identifier "Screen0"
Device "Monitor0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1920x1080_60.00"
EndSubSection
EndSection
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1 Answer 1

Reset to default
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Why are you using xorg.conf to set the resolution and not Settings -> Display?

To get it working again press ctrl+alt+F1 to open a tty, then login.
Remove the xorg.conf file you created and reboot.

If the resolution you want is missing use:

  • cvt 1920 1080 60 to create a new modeline.
  • xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync to create a new Mode.

And then create the file /usr/share/X11/xorg.conf.d/10-monitor.conf.
With the following content:

Section "Monitor"
  Identifier "Monitor0"
  <INSERT MODELINE HERE>
EndSection
Section "Screen"
  Identifier "Screen0"
  Device "<INSERT DEVICE HERE>"
  Monitor "Monitor0"
  DefaultDepth 24
  SubSection "Display"
    Depth 24
    Modes "<INSERT MODENAME HERE>"
  EndSubSection
EndSection
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5
  • My Settings -> Display does not contain 1920x1080. It contains 1360x768, but when I apply it, desktop is displayed with a significant shift. Auto on monitor doesn't help
    – skozlov
    May 2, 2015 at 14:15
  • There is no file attached, also please dont post such things in comments, edit your questen instead.
    – Pabi
    May 2, 2015 at 14:41
  • I've updated my post
    – skozlov
    May 2, 2015 at 15:01
  • Your device name should not be the monitor. You can find the devicename with sudo xrandr -q
    – Pabi
    May 2, 2015 at 15:13
  • specified VGA-0, restarted lightdm, no effect.
    – skozlov
    May 2, 2015 at 15:23

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